12156550344 has 24 divisors (see below), whose sum is σ = 32923990710. Its totient is φ = 4052183424.

The previous prime is 12156550313. The next prime is 12156550361. The reversal of 12156550344 is 44305565121.

12156550344 is a `hidden beast` number, since 1 + 2 + 1 + 565 + 50 + 3 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11699018244 + 457532100 = 108162^2 + 21390^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a junction number, because it is equal to n+sod(n) for n = 12156550299 and 12156550308.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84420417 + ... + 84420560.

Almost surely, 2^12156550344 is an apocalyptic number.

It is an amenable number.

12156550344 is an abundant number, since it is smaller than the sum of its proper divisors (20767440366).

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

12156550344 is a wasteful number, since it uses less digits than its factorization.

12156550344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168840989 (or 168840982 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

It can be divided in two parts, 12156 and 550344, that added together give a square (562500 = 750²).

The spelling of 12156550344 in words is "twelve billion, one hundred fifty-six million, five hundred fifty thousand, three hundred forty-four".