56787621311 has 4 divisors (see below), whose sum is σ = 56788447152. Its totient is φ = 56786795472.

The previous prime is 56787621301. The next prime is 56787621313. The reversal of 56787621311 is 11312678765.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56787621311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56787621313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299366 + ... + 450771.

It is an arithmetic number, because the mean of its divisors is an integer number (14197111788).

Almost surely, 2^56787621311 is an apocalyptic number.

56787621311 is a deficient number, since it is larger than the sum of its proper divisors (825841).

56787621311 is an equidigital number, since it uses as much as digits as its factorization.

56787621311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825840.

The product of its digits is 423360, while the sum is 47.

The spelling of 56787621311 in words is "fifty-six billion, seven hundred eighty-seven million, six hundred twenty-one thousand, three hundred eleven".