55138551504 has 80 divisors (see below), whose sum is σ = 143142713280. Its totient is φ = 18289152000.

The previous prime is 55138551473. The next prime is 55138551511. The reversal of 55138551504 is 40515583155.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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, 24299682 + ... + 24301950.

It is an arithmetic number, because the mean of its divisors is an integer number (1789283916).

Almost surely, 2^55138551504 is an apocalyptic number.

It is an amenable number.

55138551504 is an abundant number, since it is smaller than the sum of its proper divisors (88004161776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55138551504 is a wasteful number, since it uses less digits than its factorization.

55138551504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4548 (or 4542 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 42.

The spelling of 55138551504 in words is "fifty-five billion, one hundred thirty-eight million, five hundred fifty-one thousand, five hundred four".