55639004 has 6 divisors (see below), whose sum is σ = 97368264. Its totient is φ = 27819500.

The previous prime is 55638983. The next prime is 55639019. The reversal of 55639004 is 40093655.

It is a happy number.

It is a super-2 number, since 2×55639004² = 6191397532224032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6954872 + ... + 6954879.

It is an arithmetic number, because the mean of its divisors is an integer number (16228044).

Almost surely, 2^55639004 is an apocalyptic number.

It is an amenable number.

55639004 is a deficient number, since it is larger than the sum of its proper divisors (41729260).

55639004 is a wasteful number, since it uses less digits than its factorization.

55639004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13909755 (or 13909753 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 55639004 is about 7459.1557162993. The cubic root of 55639004 is about 381.7623678534.

The spelling of 55639004 in words is "fifty-five million, six hundred thirty-nine thousand, four".