8720617772 has 72 divisors (see below), whose sum is σ = 16593752784. Its totient is φ = 4008296448.

The previous prime is 8720617757. The next prime is 8720617799. The reversal of 8720617772 is 2777160278.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9306488 + ... + 9307424.

Almost surely, 2^8720617772 is an apocalyptic number.

It is an amenable number.

8720617772 is a deficient number, since it is larger than the sum of its proper divisors (7873135012).

8720617772 is a wasteful number, since it uses less digits than its factorization.

8720617772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 47.

The square root of 8720617772 is about 93384.2479864779. The cubic root of 8720617772 is about 2058.3335386772. Note that the first 3 decimals are identical.

The spelling of 8720617772 in words is "eight billion, seven hundred twenty million, six hundred seventeen thousand, seven hundred seventy-two".