15972297952 has 24 divisors (see below), whose sum is σ = 33864344136. Its totient is φ = 7371829632.

The previous prime is 15972297949. The next prime is 15972297961. The reversal of 15972297952 is 25979227951.

It is a happy number.

It is a super-2 number, since 2×15972297952² (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, 19197058 + ... + 19197889.

It is an arithmetic number, because the mean of its divisors is an integer number (1411014339).

Almost surely, 2^15972297952 is an apocalyptic number.

It is an amenable number.

15972297952 is an abundant number, since it is smaller than the sum of its proper divisors (17892046184).

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

15972297952 is a wasteful number, since it uses less digits than its factorization.

15972297952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38394970 (or 38394962 counting only the distinct ones).

The product of its digits is 7144200, while the sum is 58.

The spelling of 15972297952 in words is "fifteen billion, nine hundred seventy-two million, two hundred ninety-seven thousand, nine hundred fifty-two".