12105065544 has 96 divisors (see below), whose sum is σ = 35822794560. Its totient is φ = 3386021760.

The previous prime is 12105065507. The next prime is 12105065549. The reversal of 12105065544 is 44556050121.

It is a super-2 number, since 2×12105065544² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12105065549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122572 + ... + 198075.

It is an arithmetic number, because the mean of its divisors is an integer number (373154110).

Almost surely, 2^12105065544 is an apocalyptic number.

It is an amenable number.

12105065544 is an abundant number, since it is smaller than the sum of its proper divisors (23717729016).

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

12105065544 is a wasteful number, since it uses less digits than its factorization.

12105065544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320691 (or 320676 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 12105065544 in words is "twelve billion, one hundred five million, sixty-five thousand, five hundred forty-four".