54251645520 has 40 divisors (see below), whose sum is σ = 168180101856. Its totient is φ = 14467105408.

The previous prime is 54251645501. The next prime is 54251645527. The reversal of 54251645520 is 2554615245.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54251645527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113024022 + ... + 113024501.

Almost surely, 2^54251645520 is an apocalyptic number.

It is an amenable number.

54251645520 is an abundant number, since it is smaller than the sum of its proper divisors (113928456336).

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

54251645520 is a wasteful number, since it uses less digits than its factorization.

54251645520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226048539 (or 226048533 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 54251645520 in words is "fifty-four billion, two hundred fifty-one million, six hundred forty-five thousand, five hundred twenty".