55555001520 has 160 divisors (see below), whose sum is σ = 175205661120. Its totient is φ = 14560051200.

The previous prime is 55555001507. The next prime is 55555001521. The reversal of 55555001520 is 2510055555.

55555001520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55555001521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3312516 + ... + 3329244.

It is an arithmetic number, because the mean of its divisors is an integer number (1095035382).

Almost surely, 2^55555001520 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 55555001520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87602830560).

55555001520 is an abundant number, since it is smaller than the sum of its proper divisors (119650659600).

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

55555001520 is a wasteful number, since it uses less digits than its factorization.

55555001520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16983 (or 16977 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 33.

The spelling of 55555001520 in words is "fifty-five billion, five hundred fifty-five million, one thousand, five hundred twenty".