55550505505520 has 40 divisors (see below), whose sum is σ = 135952552951440. Its totient is φ = 21050717875200.

The previous prime is 55550505505507. The next prime is 55550505505567. The reversal of 55550505505520 is 2550550505555.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18273191081 + ... + 18273194120.

It is an arithmetic number, because the mean of its divisors is an integer number (3398813823786).

Almost surely, 2^{55550505505520} is an apocalyptic number.

It is an amenable number.

55550505505520 is an abundant number, since it is smaller than the sum of its proper divisors (80402047445920).

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

55550505505520 is a wasteful number, since it uses less digits than its factorization.

55550505505520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36546385233 (or 36546385227 counting only the distinct ones).

The product of its (nonzero) digits is 3906250, while the sum is 47.

The spelling of 55550505505520 in words is "fifty-five trillion, five hundred fifty billion, five hundred five million, five hundred five thousand, five hundred twenty".