56645567 has 4 divisors (see below), whose sum is σ = 61795176. Its totient is φ = 51495960.

The previous prime is 56645543. The next prime is 56645599. The reversal of 56645567 is 76554665.

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 56645567 - 2¹⁶ = 56580031 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 (56645167) 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, 2574788 + ... + 2574809.

It is an arithmetic number, because the mean of its divisors is an integer number (15448794).

Almost surely, 2^56645567 is an apocalyptic number.

56645567 is a deficient number, since it is larger than the sum of its proper divisors (5149609).

56645567 is a wasteful number, since it uses less digits than its factorization.

56645567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149608.

The product of its digits is 756000, while the sum is 44.

The square root of 56645567 is about 7526.3249331928. The cubic root of 56645567 is about 384.0507722761.

The spelling of 56645567 in words is "fifty-six million, six hundred forty-five thousand, five hundred sixty-seven".