136399864 has 16 divisors (see below), whose sum is σ = 256381200. Its totient is φ = 68031552.

The previous prime is 136399859. The next prime is 136399919. The reversal of 136399864 is 468993631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17572 + ... + 24115.

It is an arithmetic number, because the mean of its divisors is an integer number (16023825).

Almost surely, 2^136399864 is an apocalyptic number.

It is an amenable number.

136399864 is a deficient number, since it is larger than the sum of its proper divisors (119981336).

136399864 is a wasteful number, since it uses less digits than its factorization.

136399864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42102 (or 42098 counting only the distinct ones).

The product of its digits is 839808, while the sum is 49.

The square root of 136399864 is about 11679.0352341279. The cubic root of 136399864 is about 514.7598264280.

The spelling of 136399864 in words is "one hundred thirty-six million, three hundred ninety-nine thousand, eight hundred sixty-four".