56787445231 has 4 divisors (see below), whose sum is σ = 61949940264. Its totient is φ = 51624950200.

The previous prime is 56787445213. The next prime is 56787445237. The reversal of 56787445231 is 13254478765.

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

It is a cyclic number.

It is not a de Polignac number, because 56787445231 - 2¹³ = 56787437039 is a prime.

It is a super-2 number, since 2×56787445231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56787445237) 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, 2581247500 + ... + 2581247521.

It is an arithmetic number, because the mean of its divisors is an integer number (15487485066).

Almost surely, 2^56787445231 is an apocalyptic number.

56787445231 is a deficient number, since it is larger than the sum of its proper divisors (5162495033).

56787445231 is a wasteful number, since it uses less digits than its factorization.

56787445231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162495032.

The product of its digits is 5644800, while the sum is 52.

The spelling of 56787445231 in words is "fifty-six billion, seven hundred eighty-seven million, four hundred forty-five thousand, two hundred thirty-one".