15972012825 has 12 divisors (see below), whose sum is σ = 26407061328. Its totient is φ = 8518406800.

The previous prime is 15972012811. The next prime is 15972012871. The reversal of 15972012825 is 52821027951.

It is not a de Polignac number, because 15972012825 - 2⁴ = 15972012809 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106480011 + ... + 106480160.

It is an arithmetic number, because the mean of its divisors is an integer number (2200588444).

Almost surely, 2^15972012825 is an apocalyptic number.

15972012825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15972012825 is a deficient number, since it is larger than the sum of its proper divisors (10435048503).

15972012825 is a wasteful number, since it uses less digits than its factorization.

15972012825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212960184 (or 212960179 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 15972012825 in words is "fifteen billion, nine hundred seventy-two million, twelve thousand, eight hundred twenty-five".