54172684638 has 24 divisors (see below), whose sum is σ = 117386100000. Its totient is φ = 18055723104.

The previous prime is 54172684633. The next prime is 54172684639. The reversal of 54172684638 is 83648627145.

It is a happy number.

54172684638 is a `hidden beast` number, since 5 + 4 + 172 + 6 + 8 + 463 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54172684633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34738 + ... + 330986.

It is an arithmetic number, because the mean of its divisors is an integer number (4891087500).

Almost surely, 2^54172684638 is an apocalyptic number.

54172684638 is an abundant number, since it is smaller than the sum of its proper divisors (63213415362).

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

54172684638 is a wasteful number, since it uses less digits than its factorization.

54172684638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306416 (or 306413 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 54172684638 in words is "fifty-four billion, one hundred seventy-two million, six hundred eighty-four thousand, six hundred thirty-eight".