11550515664 has 40 divisors (see below), whose sum is σ = 29995080192. Its totient is φ = 3830010880.

The previous prime is 11550515653. The next prime is 11550515693. The reversal of 11550515664 is 46651505511.

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, 620769 + ... + 639104.

Almost surely, 2^11550515664 is an apocalyptic number.

It is an amenable number.

11550515664 is an abundant number, since it is smaller than the sum of its proper divisors (18444564528).

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

11550515664 is a wasteful number, since it uses less digits than its factorization.

11550515664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260075 (or 1260069 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 39.

The spelling of 11550515664 in words is "eleven billion, five hundred fifty million, five hundred fifteen thousand, six hundred sixty-four".