56781798760 has 32 divisors (see below), whose sum is σ = 129853463400. Its totient is φ = 22340378880.

The previous prime is 56781798751. The next prime is 56781798763. The reversal of 56781798760 is 6789718765.

It can be written as a sum of positive squares in 4 ways, for example, as 36188974756 + 20592824004 = 190234^2 + 143502^2 .

It is a super-2 number, since 2×56781798760² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56781798692 and 56781798701.

It is not an unprimeable number, because it can be changed into a prime (56781798763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11633175 + ... + 11638054.

Almost surely, 2^56781798760 is an apocalyptic number.

It is an amenable number.

56781798760 is an abundant number, since it is smaller than the sum of its proper divisors (73071664640).

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

56781798760 is a wasteful number, since it uses less digits than its factorization.

56781798760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23271301 (or 23271297 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 64.

The spelling of 56781798760 in words is "fifty-six billion, seven hundred eighty-one million, seven hundred ninety-eight thousand, seven hundred sixty".