12551865975 has 192 divisors, whose sum is σ = 26673292800. Its totient is φ = 5723136000.

The previous prime is 12551865973. The next prime is 12551866039. The reversal of 12551865975 is 57956815521.

12551865975 is a `hidden beast` number, since 1 + 2 + 5 + 518 + 6 + 59 + 75 = 666.

It is not a de Polignac number, because 12551865975 - 2¹ = 12551865973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551865973) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 27227245 + ... + 27227705.

It is an arithmetic number, because the mean of its divisors is an integer number (138923400).

Almost surely, 2^12551865975 is an apocalyptic number.

12551865975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12551865975 is an abundant number, since it is smaller than the sum of its proper divisors (14121426825).

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

12551865975 is a wasteful number, since it uses less digits than its factorization.

12551865975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 692 counting only the distinct ones).

The product of its digits is 3780000, while the sum is 54.

The spelling of 12551865975 in words is "twelve billion, five hundred fifty-one million, eight hundred sixty-five thousand, nine hundred seventy-five".