15325989972 has 12 divisors (see below), whose sum is σ = 35760643296. Its totient is φ = 5108663320.

The previous prime is 15325989949. The next prime is 15325989979. The reversal of 15325989972 is 27998952351.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15325989979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638582904 + ... + 638582927.

It is an arithmetic number, because the mean of its divisors is an integer number (2980053608).

Almost surely, 2^15325989972 is an apocalyptic number.

15325989972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15325989972 is an abundant number, since it is smaller than the sum of its proper divisors (20434653324).

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

15325989972 is a wasteful number, since it uses less digits than its factorization.

15325989972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277165838 (or 1277165836 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 60.

The spelling of 15325989972 in words is "fifteen billion, three hundred twenty-five million, nine hundred eighty-nine thousand, nine hundred seventy-two".