61564526104 has 64 divisors (see below), whose sum is σ = 128994508800. Its totient is φ = 27374621184.

The previous prime is 61564526099. The next prime is 61564526113. The reversal of 61564526104 is 40162546516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 958569 + ... + 1020775.

It is an arithmetic number, because the mean of its divisors is an integer number (2015539200).

Almost surely, 2^61564526104 is an apocalyptic number.

It is an amenable number.

61564526104 is an abundant number, since it is smaller than the sum of its proper divisors (67429982696).

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

61564526104 is a wasteful number, since it uses less digits than its factorization.

61564526104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62632 (or 62628 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 61564526104 in words is "sixty-one billion, five hundred sixty-four million, five hundred twenty-six thousand, one hundred four".