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2918689961 = 11709374239
BaseRepresentation
bin1010110111110111…
…1010110010101001
321112102000210221012
42231331322302221
521434141034321
61201341353305
7132220312115
oct25575726251
97472023835
102918689961
111268584a70
12695568835
133768b5aa5
141d98bc745
1512138205b
hexadf7aca9

2918689961 has 8 divisors (see below), whose sum is σ = 3188524800. Its totient is φ = 2649605040.

The previous prime is 2918689901. The next prime is 2918689967. The reversal of 2918689961 is 1699868192.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2918689961 - 218 = 2918427817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2918689961.

It is not an unprimeable number, because it can be changed into a prime (2918689967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179321 + ... + 194918.

It is an arithmetic number, because the mean of its divisors is an integer number (398565600).

Almost surely, 22918689961 is an apocalyptic number.

It is an amenable number.

2918689961 is a deficient number, since it is larger than the sum of its proper divisors (269834839).

2918689961 is a wasteful number, since it uses less digits than its factorization.

2918689961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374959.

The product of its digits is 3359232, while the sum is 59.

The square root of 2918689961 is about 54024.9013048613. The cubic root of 2918689961 is about 1429.1001169955.

The spelling of 2918689961 in words is "two billion, nine hundred eighteen million, six hundred eighty-nine thousand, nine hundred sixty-one".

Divisors: 1 11 709 7799 374239 4116629 265335451 2918689961