61980617632 has 48 divisors (see below), whose sum is σ = 122426429832. Its totient is φ = 30888345600.

The previous prime is 61980617609. The next prime is 61980617681. The reversal of 61980617632 is 23671608916.

61980617632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 31939408656 + 30041208976 = 178716^2 + 173324^2 .

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, 22126632 + ... + 22129432.

Almost surely, 2^61980617632 is an apocalyptic number.

It is an amenable number.

61980617632 is a deficient number, since it is larger than the sum of its proper divisors (60445812200).

61980617632 is a wasteful number, since it uses less digits than its factorization.

61980617632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4841 (or 4833 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 61980617632 in words is "sixty-one billion, nine hundred eighty million, six hundred seventeen thousand, six hundred thirty-two".