55515033520 has 20 divisors (see below), whose sum is σ = 129072453120. Its totient is φ = 22206013376.

The previous prime is 55515033517. The next prime is 55515033533. The reversal of 55515033520 is 2533051555.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346968880 + ... + 346969039.

It is an arithmetic number, because the mean of its divisors is an integer number (6453622656).

Almost surely, 2^55515033520 is an apocalyptic number.

It is an amenable number.

55515033520 is an abundant number, since it is smaller than the sum of its proper divisors (73557419600).

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

55515033520 is a wasteful number, since it uses less digits than its factorization.

55515033520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693937932 (or 693937926 counting only the distinct ones).

The product of its (nonzero) digits is 56250, while the sum is 34.

The spelling of 55515033520 in words is "fifty-five billion, five hundred fifteen million, thirty-three thousand, five hundred twenty".