56642987140 has 48 divisors (see below), whose sum is σ = 126600071472. Its totient is φ = 21213904896.

The previous prime is 56642987119. The next prime is 56642987143. The reversal of 56642987140 is 4178924665.

It can be written as a sum of positive squares in 8 ways, for example, as 182574144 + 56460412996 = 13512^2 + 237614^2 .

It is not an unprimeable number, because it can be changed into a prime (56642987143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365979 + ... + 497218.

It is an arithmetic number, because the mean of its divisors is an integer number (2637501489).

Almost surely, 2^56642987140 is an apocalyptic number.

It is an amenable number.

56642987140 is an abundant number, since it is smaller than the sum of its proper divisors (69957084332).

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

56642987140 is a wasteful number, since it uses less digits than its factorization.

56642987140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863416 (or 863414 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 56642987140 in words is "fifty-six billion, six hundred forty-two million, nine hundred eighty-seven thousand, one hundred forty".