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25490916615609 = 3216829512
BaseRepresentation
bin1011100101111000100010…
…00001111010010110111001
310100020220111210210121102100
411302330101001322112321
511320120344123144414
6130114210533254013
75240441451122244
oct562742101722671
9110226453717370
1025490916615609
118138700978945
122a38388494309
13112ba2469bab3
14641aa470825b
152e3125a3c609
hex172f1107a5b9

25490916615609 has 9 divisors (see below), whose sum is σ = 36820234767589. Its totient is φ = 16993934312700.

The previous prime is 25490916615569. The next prime is 25490916615611. The reversal of 25490916615609 is 90651661909452.

The square root of 25490916615609 is 5048853.

It is a perfect power (a square), and thus also a powerful number.

25490916615609 is a `hidden beast` number, since 2 + 5 + 4 + 9 + 0 + 9 + 1 + 6 + 6 + 15 + 609 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2k-25490916615609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25490916715609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14305084 + ... + 15988034.

Almost surely, 225490916615609 is an apocalyptic number.

25490916615609 is the 5048853-rd square number.

25490916615609 is the 2524427-th centered octagonal number.

It is an amenable number.

25490916615609 is a deficient number, since it is larger than the sum of its proper divisors (11329318151980).

25490916615609 is an frugal number, since it uses more digits than its factorization.

25490916615609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365908 (or 1682954 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 63.

The spelling of 25490916615609 in words is "twenty-five trillion, four hundred ninety billion, nine hundred sixteen million, six hundred fifteen thousand, six hundred nine".

Divisors: 1 3 9 1682951 5048853 15146559 2832324068401 8496972205203 25490916615609