61397739024 has 40 divisors (see below), whose sum is σ = 162897609600. Its totient is φ = 19912779648.

The previous prime is 61397739017. The next prime is 61397739041. The reversal of 61397739024 is 42093779316.

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, 17283624 + ... + 17287175.

It is an arithmetic number, because the mean of its divisors is an integer number (4072440240).

Almost surely, 2^61397739024 is an apocalyptic number.

It is an amenable number.

61397739024 is an abundant number, since it is smaller than the sum of its proper divisors (101499870576).

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

61397739024 is a wasteful number, since it uses less digits than its factorization.

61397739024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34570847 (or 34570841 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 51.

The spelling of 61397739024 in words is "sixty-one billion, three hundred ninety-seven million, seven hundred thirty-nine thousand, twenty-four".