9907120672 has 12 divisors (see below), whose sum is σ = 19504643886. Its totient is φ = 4953560320.

The previous prime is 9907120661. The next prime is 9907120723. The reversal of 9907120672 is 2760217099.

It can be written as a sum of positive squares in only one way, i.e., 9889109136 + 18011536 = 99444^2 + 4244^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154798729 + ... + 154798792.

Almost surely, 2^9907120672 is an apocalyptic number.

It is an amenable number.

9907120672 is a deficient number, since it is larger than the sum of its proper divisors (9597523214).

9907120672 is a wasteful number, since it uses less digits than its factorization.

9907120672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309597531 (or 309597523 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 9907120672 is about 99534.5200018566. The cubic root of 9907120672 is about 2147.7438508481.

The spelling of 9907120672 in words is "nine billion, nine hundred seven million, one hundred twenty thousand, six hundred seventy-two".