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61716932621 = 211292497311
BaseRepresentation
bin111001011110100111…
…011010100000001101
312220022011022000112022
4321132213122200031
52002344013320441
644204040015525
74313255162111
oct713647324015
9186264260468
1061716932621
11241a0665a43
12bb64a615a5
135a87384956
142db6905741
15191334d84b
hexe5e9da80d

61716932621 has 4 divisors (see below), whose sum is σ = 62009430144. Its totient is φ = 61424435100.

The previous prime is 61716932611. The next prime is 61716932623. The reversal of 61716932621 is 12623961716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-61716932621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61716932623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146248445 + ... + 146248866.

It is an arithmetic number, because the mean of its divisors is an integer number (15502357536).

Almost surely, 261716932621 is an apocalyptic number.

It is an amenable number.

61716932621 is a deficient number, since it is larger than the sum of its proper divisors (292497523).

61716932621 is a wasteful number, since it uses less digits than its factorization.

61716932621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292497522.

The product of its digits is 163296, while the sum is 44.

The spelling of 61716932621 in words is "sixty-one billion, seven hundred sixteen million, nine hundred thirty-two thousand, six hundred twenty-one".

Divisors: 1 211 292497311 61716932621