11550918321 has 12 divisors (see below), whose sum is σ = 16688647248. Its totient is φ = 7698771864.

The previous prime is 11550918307. The next prime is 11550918329. The reversal of 11550918321 is 12381905511.

11550918321 is a `hidden beast` number, since 1 + 1 + 550 + 9 + 1 + 83 + 21 = 666.

It is not a de Polignac number, because 11550918321 - 2⁵ = 11550918289 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11550918329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113055 + ... + 189428.

It is an arithmetic number, because the mean of its divisors is an integer number (1390720604).

Almost surely, 2^11550918321 is an apocalyptic number.

It is an amenable number.

11550918321 is a deficient number, since it is larger than the sum of its proper divisors (5137728927).

11550918321 is a wasteful number, since it uses less digits than its factorization.

11550918321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306732 (or 306729 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

The spelling of 11550918321 in words is "eleven billion, five hundred fifty million, nine hundred eighteen thousand, three hundred twenty-one".