12078015107172 has 72 divisors (see below), whose sum is σ = 33073300715616. Its totient is φ = 3420322843392.

The previous prime is 12078015107167. The next prime is 12078015107203. The reversal of 12078015107172 is 27170151087021.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90822238 + ... + 90955125.

It is an arithmetic number, because the mean of its divisors is an integer number (459351398828).

Almost surely, 2^{12078015107172} is an apocalyptic number.

12078015107172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12078015107172 is an abundant number, since it is smaller than the sum of its proper divisors (20995285608444).

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

12078015107172 is a wasteful number, since it uses less digits than its factorization.

12078015107172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181777497 (or 181777488 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 42.

The spelling of 12078015107172 in words is "twelve trillion, seventy-eight billion, fifteen million, one hundred seven thousand, one hundred seventy-two".