56685240644820 has 24 divisors (see below), whose sum is σ = 158718673805664. Its totient is φ = 15116064171936.

The previous prime is 56685240644801. The next prime is 56685240644821. The reversal of 56685240644820 is 2844604258665.

It is a super-2 number, since 2×56685240644820² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 944754010747 = 56685240644820 / (5 + 6 + 6 + 8 + 5 + 2 + 4 + 0 + 6 + 4 + 4 + 8 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56685240644821) 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, 472377005314 + ... + 472377005433.

It is an arithmetic number, because the mean of its divisors is an integer number (6613278075236).

Almost surely, 2^{56685240644820} is an apocalyptic number.

It is an amenable number.

56685240644820 is an abundant number, since it is smaller than the sum of its proper divisors (102033433160844).

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

56685240644820 is a wasteful number, since it uses less digits than its factorization.

56685240644820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944754010759 (or 944754010757 counting only the distinct ones).

The product of its (nonzero) digits is 88473600, while the sum is 60.

The spelling of 56685240644820 in words is "fifty-six trillion, six hundred eighty-five billion, two hundred forty million, six hundred forty-four thousand, eight hundred twenty".