61539675008 has 64 divisors (see below), whose sum is σ = 140146735200. Its totient is φ = 26367731712.

The previous prime is 61539674971. The next prime is 61539675037. The reversal of 61539675008 is 80057693516.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6544166 + ... + 6553562.

Almost surely, 2^61539675008 is an apocalyptic number.

It is an amenable number.

61539675008 is an abundant number, since it is smaller than the sum of its proper divisors (78607060192).

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

61539675008 is an equidigital number, since it uses as much as digits as its factorization.

61539675008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16727 (or 16715 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 61539675008 in words is "sixty-one billion, five hundred thirty-nine million, six hundred seventy-five thousand, eight".