15972245972 has 12 divisors (see below), whose sum is σ = 27982118976. Its totient is φ = 7977354840.

The previous prime is 15972245881. The next prime is 15972246001. The reversal of 15972245972 is 27954227951.

It is a super-2 number, since 2×15972245972² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2187938 + ... + 2195225.

It is an arithmetic number, because the mean of its divisors is an integer number (2331843248).

Almost surely, 2^15972245972 is an apocalyptic number.

It is an amenable number.

15972245972 is a deficient number, since it is larger than the sum of its proper divisors (12009873004).

15972245972 is a wasteful number, since it uses less digits than its factorization.

15972245972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4384078 (or 4384076 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 53.

The spelling of 15972245972 in words is "fifteen billion, nine hundred seventy-two million, two hundred forty-five thousand, nine hundred seventy-two".