11550023021556 has 48 divisors (see below), whose sum is σ = 29945026451200. Its totient is φ = 3849940518336.

The previous prime is 11550023021513. The next prime is 11550023021567. The reversal of 11550023021556 is 65512032005511.

11550023021556 is a `hidden beast` number, since 1 + 1 + 5 + 50 + 0 + 2 + 30 + 21 + 556 = 666.

It is a super-2 number, since 2×11550023021556² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11550023021556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5491461 + ... + 7297683.

Almost surely, 2^{11550023021556} is an apocalyptic number.

It is an amenable number.

11550023021556 is an abundant number, since it is smaller than the sum of its proper divisors (18395003429644).

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

11550023021556 is a wasteful number, since it uses less digits than its factorization.

11550023021556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865445 (or 1865437 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 11550023021556 in words is "eleven trillion, five hundred fifty billion, twenty-three million, twenty-one thousand, five hundred fifty-six".