12501251388 has 18 divisors (see below), whose sum is σ = 31600385544. Its totient is φ = 4167083784.

The previous prime is 12501251333. The next prime is 12501251429. The reversal of 12501251388 is 88315210521.

12501251388 is a `hidden beast` number, since 1 + 2 + 50 + 12 + 513 + 88 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 347256983 = 12501251388 / (1 + 2 + 5 + 0 + 1 + 2 + 5 + 1 + 3 + 8 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173628456 + ... + 173628527.

Almost surely, 2^12501251388 is an apocalyptic number.

12501251388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12501251388 is an abundant number, since it is smaller than the sum of its proper divisors (19099134156).

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

12501251388 is a wasteful number, since it uses less digits than its factorization.

12501251388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347256993 (or 347256988 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

It can be divided in two parts, 125012 and 51388, that added together give a square (176400 = 420²).

The spelling of 12501251388 in words is "twelve billion, five hundred one million, two hundred fifty-one thousand, three hundred eighty-eight".