8136973720 has 32 divisors (see below), whose sum is σ = 18310983120. Its totient is φ = 3254293120.

The previous prime is 8136973709. The next prime is 8136973751. The reversal of 8136973720 is 273796318.

It is a happy number.

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, 365715 + ... + 387325.

Almost surely, 2^8136973720 is an apocalyptic number.

It is an amenable number.

8136973720 is an abundant number, since it is smaller than the sum of its proper divisors (10174009400).

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

8136973720 is a wasteful number, since it uses less digits than its factorization.

8136973720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31035 (or 31031 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 8136973720 is about 90205.1756829950. The cubic root of 8136973720 is about 2011.3499442071.

The spelling of 8136973720 in words is "eight billion, one hundred thirty-six million, nine hundred seventy-three thousand, seven hundred twenty".