56104642640 has 60 divisors (see below), whose sum is σ = 132617468412. Its totient is φ = 22073840640.

The previous prime is 56104642609. The next prime is 56104642663. The reversal of 56104642640 is 4624640165.

It can be written as a sum of positive squares in 6 ways, for example, as 7778534416 + 48326108224 = 88196^2 + 219832^2 .

It is a junction number, because it is equal to n+sod(n) for n = 56104642594 and 56104642603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203444 + ... + 391916.

Almost surely, 2^56104642640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56104642640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66308734206).

56104642640 is an abundant number, since it is smaller than the sum of its proper divisors (76512825772).

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

56104642640 is a wasteful number, since it uses less digits than its factorization.

56104642640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188608 (or 188541 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 56104642640 in words is "fifty-six billion, one hundred four million, six hundred forty-two thousand, six hundred forty".