12115455444 has 30 divisors (see below), whose sum is σ = 31672194554. Its totient is φ = 4038485040.

The previous prime is 12115455427. The next prime is 12115455509. The reversal of 12115455444 is 44455451121.

12115455444 is a `hidden beast` number, since 1 + 2 + 11 + 54 + 554 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11053999044 + 1061456400 = 105138^2 + 32580^2 .

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 = 12115455399 and 12115455408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18696367 + ... + 18697014.

Almost surely, 2^12115455444 is an apocalyptic number.

It is an amenable number.

12115455444 is an abundant number, since it is smaller than the sum of its proper divisors (19556739110).

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

12115455444 is a wasteful number, since it uses less digits than its factorization.

12115455444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37393397 (or 37393386 counting only the distinct ones).

The product of its digits is 64000, while the sum is 36.

The spelling of 12115455444 in words is "twelve billion, one hundred fifteen million, four hundred fifty-five thousand, four hundred forty-four".