55638477432590 has 16 divisors (see below), whose sum is σ = 107853048561888. Its totient is φ = 20543437821216.

The previous prime is 55638477432583. The next prime is 55638477432613. The reversal of 55638477432590 is 9523477483655.

It is a self number, because there is not a number n which added to its sum of digits gives 55638477432590.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213994143842 + ... + 213994144101.

It is an arithmetic number, because the mean of its divisors is an integer number (6740815535118).

Almost surely, 2^{55638477432590} is an apocalyptic number.

55638477432590 is a deficient number, since it is larger than the sum of its proper divisors (52214571129298).

55638477432590 is a wasteful number, since it uses less digits than its factorization.

55638477432590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427988287963.

The product of its (nonzero) digits is 762048000, while the sum is 68.

The spelling of 55638477432590 in words is "fifty-five trillion, six hundred thirty-eight billion, four hundred seventy-seven million, four hundred thirty-two thousand, five hundred ninety".