54221121564 has 96 divisors (see below), whose sum is σ = 132731633664. Its totient is φ = 17194584000.

The previous prime is 54221121523. The next prime is 54221121593. The reversal of 54221121564 is 46512112245.

It is a happy number.

54221121564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72198189 + ... + 72198939.

It is an arithmetic number, because the mean of its divisors is an integer number (1382621184).

Almost surely, 2^54221121564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54221121564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66365816832).

54221121564 is an abundant number, since it is smaller than the sum of its proper divisors (78510512100).

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

54221121564 is a wasteful number, since it uses less digits than its factorization.

54221121564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847 (or 1845 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The spelling of 54221121564 in words is "fifty-four billion, two hundred twenty-one million, one hundred twenty-one thousand, five hundred sixty-four".