56638507 has 4 divisors (see below), whose sum is σ = 58019976. Its totient is φ = 55257040.

The previous prime is 56638501. The next prime is 56638511. The reversal of 56638507 is 70583665.

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 56638507 - 2³ = 56638499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56638507.

It is not an unprimeable number, because it can be changed into a prime (56638501) 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, 690673 + ... + 690754.

It is an arithmetic number, because the mean of its divisors is an integer number (14504994).

Almost surely, 2^56638507 is an apocalyptic number.

56638507 is a deficient number, since it is larger than the sum of its proper divisors (1381469).

56638507 is a wasteful number, since it uses less digits than its factorization.

56638507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381468.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 56638507 is about 7525.8558981687. The cubic root of 56638507 is about 384.0348162696.

The spelling of 56638507 in words is "fifty-six million, six hundred thirty-eight thousand, five hundred seven".