55638963 has 6 divisors (see below), whose sum is σ = 80367404. Its totient is φ = 37092636.

The previous prime is 55638959. The next prime is 55638971. The reversal of 55638963 is 36983655.

55638963 is a `hidden beast` number, since 5 + 5 + 638 + 9 + 6 + 3 = 666.

It is not a de Polignac number, because 55638963 - 2² = 55638959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55638953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3091045 + ... + 3091062.

Almost surely, 2^55638963 is an apocalyptic number.

55638963 is a deficient number, since it is larger than the sum of its proper divisors (24728441).

55638963 is a wasteful number, since it uses less digits than its factorization.

55638963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6182113 (or 6182110 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 55638963 is about 7459.1529679984. The cubic root of 55638963 is about 381.7622740807.

The spelling of 55638963 in words is "fifty-five million, six hundred thirty-eight thousand, nine hundred sixty-three".