56638633 has 4 divisors (see below), whose sum is σ = 56684880. Its totient is φ = 56592388.

The previous prime is 56638613. The next prime is 56638661. The reversal of 56638633 is 33683665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33683665 = 5 ⋅6736733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56638633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56638613) 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, 21235 + ... + 23752.

It is an arithmetic number, because the mean of its divisors is an integer number (14171220).

Almost surely, 2^56638633 is an apocalyptic number.

It is an amenable number.

56638633 is a deficient number, since it is larger than the sum of its proper divisors (46247).

56638633 is a wasteful number, since it uses less digits than its factorization.

56638633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46246.

The product of its digits is 233280, while the sum is 40.

The square root of 56638633 is about 7525.8642693049. The cubic root of 56638633 is about 384.0351010484.

The spelling of 56638633 in words is "fifty-six million, six hundred thirty-eight thousand, six hundred thirty-three".