55638065 has 16 divisors (see below), whose sum is σ = 76910592. Its totient is φ = 37848384.

The previous prime is 55638053. The next prime is 55638113. The reversal of 55638065 is 56083655.

It is not a de Polignac number, because 55638065 - 2⁴ = 55638049 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1814 + ... + 10703.

It is an arithmetic number, because the mean of its divisors is an integer number (4806912).

Almost surely, 2^55638065 is an apocalyptic number.

It is an amenable number.

55638065 is a deficient number, since it is larger than the sum of its proper divisors (21272527).

55638065 is a wasteful number, since it uses less digits than its factorization.

55638065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12656.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 55638065 is about 7459.0927732533. The cubic root of 55638065 is about 381.7602202180.

The spelling of 55638065 in words is "fifty-five million, six hundred thirty-eight thousand, sixty-five".