61516312665164 has 12 divisors (see below), whose sum is σ = 123032625330384. Its totient is φ = 26364133999344.

The previous prime is 61516312665133. The next prime is 61516312665167. The reversal of 61516312665164 is 46156621361516.

It is a happy number.

61516312665164 is an admirable number.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61516312665167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098505583279 + ... + 1098505583334.

It is an arithmetic number, because the mean of its divisors is an integer number (10252718777532).

Almost surely, 2^{61516312665164} is an apocalyptic number.

It is an amenable number.

61516312665164 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61516312665164 is a wasteful number, since it uses less digits than its factorization.

61516312665164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197011166624 (or 2197011166622 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 53.

The spelling of 61516312665164 in words is "sixty-one trillion, five hundred sixteen billion, three hundred twelve million, six hundred sixty-five thousand, one hundred sixty-four".