136640763 has 60 divisors (see below), whose sum is σ = 240015600. Its totient is φ = 77239008.

The previous prime is 136640759. The next prime is 136640773. The reversal of 136640763 is 367046631.

It is a happy number.

136640763 is a `hidden beast` number, since 1 + 3 + 6 + 640 + 7 + 6 + 3 = 666.

It is not a de Polignac number, because 136640763 - 2² = 136640759 is a prime.

It is a super-2 number, since 2×136640763² = 37341396226444338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136640773) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 686538 + ... + 686736.

It is an arithmetic number, because the mean of its divisors is an integer number (4000260).

Almost surely, 2^136640763 is an apocalyptic number.

136640763 is a deficient number, since it is larger than the sum of its proper divisors (103374837).

136640763 is a wasteful number, since it uses less digits than its factorization.

136640763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 136640763 is about 11689.3439935695. The cubic root of 136640763 is about 515.0626913345.

The spelling of 136640763 in words is "one hundred thirty-six million, six hundred forty thousand, seven hundred sixty-three".