56720420433765 has 48 divisors (see below), whose sum is σ = 107255943624960. Its totient is φ = 27500095808640.

The previous prime is 56720420433763. The next prime is 56720420433959. The reversal of 56720420433765 is 56733402402765.

56720420433765 is a `hidden beast` number, since 5 + 6 + 7 + 204 + 20 + 43 + 376 + 5 = 666.

It is not a de Polignac number, because 56720420433765 - 2¹ = 56720420433763 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56720420433763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17848191 + ... + 20784579.

It is an arithmetic number, because the mean of its divisors is an integer number (2234498825520).

Almost surely, 2^{56720420433765} is an apocalyptic number.

56720420433765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56720420433765 is a deficient number, since it is larger than the sum of its proper divisors (50535523191195).

56720420433765 is a wasteful number, since it uses less digits than its factorization.

56720420433765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975434 (or 2975431 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 54.

The spelling of 56720420433765 in words is "fifty-six trillion, seven hundred twenty billion, four hundred twenty million, four hundred thirty-three thousand, seven hundred sixty-five".