8721772792 has 32 divisors (see below), whose sum is σ = 16406575920. Its totient is φ = 4346713600.

The previous prime is 8721772789. The next prime is 8721772817. The reversal of 8721772792 is 2972771278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4587042 + ... + 4588942.

Almost surely, 2^8721772792 is an apocalyptic number.

It is an amenable number.

8721772792 is a deficient number, since it is larger than the sum of its proper divisors (7684803128).

8721772792 is a wasteful number, since it uses less digits than its factorization.

8721772792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471 (or 3467 counting only the distinct ones).

The product of its digits is 1382976, while the sum is 52.

The square root of 8721772792 is about 93390.4320152766. The cubic root of 8721772792 is about 2058.4244080595.

The spelling of 8721772792 in words is "eight billion, seven hundred twenty-one million, seven hundred seventy-two thousand, seven hundred ninety-two".