2815693812 has 30 divisors (see below), whose sum is σ = 7360780658. Its totient is φ = 938564496.

The previous prime is 2815693763. The next prime is 2815693843. The reversal of 2815693812 is 2183965182.

2815693812 is a `hidden beast` number, since 2 + 8 + 1 + 569 + 3 + 81 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2054264976 + 761428836 = 45324^2 + 27594^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4344883 + ... + 4345530.

Almost surely, 2^2815693812 is an apocalyptic number.

It is an amenable number.

2815693812 is an abundant number, since it is smaller than the sum of its proper divisors (4545086846).

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

2815693812 is a wasteful number, since it uses less digits than its factorization.

2815693812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8690429 (or 8690418 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 2815693812 is about 53063.1115936486. Note that the first 3 decimals coincide. The cubic root of 2815693812 is about 1412.0881509166.

The spelling of 2815693812 in words is "two billion, eight hundred fifteen million, six hundred ninety-three thousand, eight hundred twelve".