12551366407572 has 18 divisors (see below), whose sum is σ = 31727065085898. Its totient is φ = 4183788802512.

The previous prime is 12551366407553. The next prime is 12551366407579. The reversal of 12551366407572 is 27570466315521.

It is a happy number.

12551366407572 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 1 + 3 + 6 + 64 + 0 + 7 + 572 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7156031605776 + 5395334801796 = 2675076^2 + 2322786^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551366407579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 174324533403 + ... + 174324533474.

Almost surely, 2^{12551366407572} is an apocalyptic number.

12551366407572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12551366407572 is an abundant number, since it is smaller than the sum of its proper divisors (19175698678326).

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

12551366407572 is a wasteful number, since it uses less digits than its factorization.

12551366407572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348649066887 (or 348649066882 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 54.

The spelling of 12551366407572 in words is "twelve trillion, five hundred fifty-one billion, three hundred sixty-six million, four hundred seven thousand, five hundred seventy-two".