54621856669824 has 128 divisors (see below), whose sum is σ = 163200592824000. Its totient is φ = 18207285463296.

The previous prime is 54621856669691. The next prime is 54621856669847. The reversal of 54621856669824 is 42896665812645.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 97281394 + ... + 97841265.

Almost surely, 2^{54621856669824} is an apocalyptic number.

54621856669824 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

54621856669824 is an abundant number, since it is smaller than the sum of its proper divisors (108578736154176).

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

54621856669824 is an frugal number, since it uses more digits than its factorization.

54621856669824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195122694 (or 195122664 counting only the distinct ones).

The product of its digits is 1194393600, while the sum is 72.

The spelling of 54621856669824 in words is "fifty-four trillion, six hundred twenty-one billion, eight hundred fifty-six million, six hundred sixty-nine thousand, eight hundred twenty-four".