8120686772 has 12 divisors (see below), whose sum is σ = 15503129376. Its totient is φ = 3691221240.

The previous prime is 8120686759. The next prime is 8120686787. The reversal of 8120686772 is 2776860218.

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, 92280488 + ... + 92280575.

It is an arithmetic number, because the mean of its divisors is an integer number (1291927448).

Almost surely, 2^8120686772 is an apocalyptic number.

It is an amenable number.

8120686772 is a deficient number, since it is larger than the sum of its proper divisors (7382442604).

8120686772 is a wasteful number, since it uses less digits than its factorization.

8120686772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184561078 (or 184561076 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 8120686772 is about 90114.8532263134. The cubic root of 8120686772 is about 2010.0070766976.

The spelling of 8120686772 in words is "eight billion, one hundred twenty million, six hundred eighty-six thousand, seven hundred seventy-two".