55651005520 has 80 divisors (see below), whose sum is σ = 149454237888. Its totient is φ = 19046328320.

The previous prime is 55651005467. The next prime is 55651005521. The reversal of 55651005520 is 2550015655.

55651005520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55651005521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1845034 + ... + 1874953.

Almost surely, 2^55651005520 is an apocalyptic number.

It is an amenable number.

55651005520 is an abundant number, since it is smaller than the sum of its proper divisors (93803232368).

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

55651005520 is a wasteful number, since it uses less digits than its factorization.

55651005520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720028 (or 3720022 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 34.

The spelling of 55651005520 in words is "fifty-five billion, six hundred fifty-one million, five thousand, five hundred twenty".