136657864 has 24 divisors (see below), whose sum is σ = 298068390. Its totient is φ = 58567488.

The previous prime is 136657853. The next prime is 136657907. The reversal of 136657864 is 468756631.

It can be written as a sum of positive squares in only one way, i.e., 136656100 + 1764 = 11690^2 + 42^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173917 + ... + 174700.

Almost surely, 2^136657864 is an apocalyptic number.

136657864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

136657864 is an abundant number, since it is smaller than the sum of its proper divisors (161410526).

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

136657864 is a wasteful number, since it uses less digits than its factorization.

136657864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348637 (or 348626 counting only the distinct ones).

The product of its digits is 725760, while the sum is 46.

The square root of 136657864 is about 11690.0754488583. The cubic root of 136657864 is about 515.0841776501.

The spelling of 136657864 in words is "one hundred thirty-six million, six hundred fifty-seven thousand, eight hundred sixty-four".