12133554550 has 96 divisors (see below), whose sum is σ = 25451995968. Its totient is φ = 4269957120.

The previous prime is 12133554493. The next prime is 12133554569. The reversal of 12133554550 is 5545533121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4678054 + ... + 4680646.

It is an arithmetic number, because the mean of its divisors is an integer number (265124958).

Almost surely, 2^12133554550 is an apocalyptic number.

12133554550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12133554550 is an abundant number, since it is smaller than the sum of its proper divisors (13318441418).

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

12133554550 is a wasteful number, since it uses less digits than its factorization.

12133554550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954 (or 2949 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 12133554550 in words is "twelve billion, one hundred thirty-three million, five hundred fifty-four thousand, five hundred fifty".