36686644686 has 64 divisors (see below), whose sum is σ = 82252800000. Its totient is φ = 12120046848.

The previous prime is 36686644649. The next prime is 36686644697. The reversal of 36686644686 is 68644668663.

36686644686 is a `hidden beast` number, since 36 + 6 + 86 + 6 + 446 + 86 = 666.

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 31 ways as a sum of consecutive naturals, for example, 8563501 + ... + 8567783.

It is an arithmetic number, because the mean of its divisors is an integer number (1285200000).

Almost surely, 2^36686644686 is an apocalyptic number.

36686644686 is an abundant number, since it is smaller than the sum of its proper divisors (45566155314).

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

36686644686 is a wasteful number, since it uses less digits than its factorization.

36686644686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5670 (or 5664 counting only the distinct ones).

The product of its digits is 143327232, while the sum is 63.

The spelling of 36686644686 in words is "thirty-six billion, six hundred eighty-six million, six hundred forty-four thousand, six hundred eighty-six".