8156939900 has 18 divisors (see below), whose sum is σ = 17700559800. Its totient is φ = 3262775920.

The previous prime is 8156939831. The next prime is 8156939929. The reversal of 8156939900 is 99396518.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40784600 + ... + 40784799.

Almost surely, 2^8156939900 is an apocalyptic number.

It is an amenable number.

8156939900 is an abundant number, since it is smaller than the sum of its proper divisors (9543619900).

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

8156939900 is a wasteful number, since it uses less digits than its factorization.

8156939900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81569413 (or 81569406 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 8156939900 is about 90315.7787986130. The cubic root of 8156939900 is about 2012.9937237532.

The spelling of 8156939900 in words is "eight billion, one hundred fifty-six million, nine hundred thirty-nine thousand, nine hundred".