9725616972 has 48 divisors (see below), whose sum is σ = 26697777120. Its totient is φ = 3051173376.

The previous prime is 9725616961. The next prime is 9725617003. The reversal of 9725616972 is 2796165279.

9725616972 is a `hidden beast` number, since 9 + 7 + 2 + 561 + 6 + 9 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2646753 + ... + 2650424.

It is an arithmetic number, because the mean of its divisors is an integer number (556203690).

Almost surely, 2^9725616972 is an apocalyptic number.

It is an amenable number.

9725616972 is an abundant number, since it is smaller than the sum of its proper divisors (16972160148).

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

9725616972 is a wasteful number, since it uses less digits than its factorization.

9725616972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297207 (or 5297199 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 9725616972 is about 98618.5427391827. The cubic root of 9725616972 is about 2134.5469934526.

The spelling of 9725616972 in words is "nine billion, seven hundred twenty-five million, six hundred sixteen thousand, nine hundred seventy-two".