8136313785 has 64 divisors (see below), whose sum is σ = 14980700160. Its totient is φ = 4185457920.

The previous prime is 8136313763. The next prime is 8136313789. The reversal of 8136313785 is 5873136318.

8136313785 is a `hidden beast` number, since 8 + 1 + 3 + 631 + 3 + 7 + 8 + 5 = 666.

It is not a de Polignac number, because 8136313785 - 2⁵ = 8136313753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8136313785.

It is not an unprimeable number, because it can be changed into a prime (8136313789) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1323579 + ... + 1329711.

It is an arithmetic number, because the mean of its divisors is an integer number (234073440).

Almost surely, 2^8136313785 is an apocalyptic number.

It is an amenable number.

8136313785 is a deficient number, since it is larger than the sum of its proper divisors (6844386375).

8136313785 is a wasteful number, since it uses less digits than its factorization.

8136313785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495 (or 6489 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 8136313785 is about 90201.5176424432. The cubic root of 8136313785 is about 2011.2955670657.

The spelling of 8136313785 in words is "eight billion, one hundred thirty-six million, three hundred thirteen thousand, seven hundred eighty-five".