136640768 has 36 divisors (see below), whose sum is σ = 297549168. Its totient is φ = 62108160.

The previous prime is 136640759. The next prime is 136640773. The reversal of 136640768 is 867046631.

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, 21446 + ... + 27077.

Almost surely, 2^136640768 is an apocalyptic number.

It is an amenable number.

136640768 is an abundant number, since it is smaller than the sum of its proper divisors (160908400).

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

136640768 is an equidigital number, since it uses as much as digits as its factorization.

136640768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48550 (or 48536 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 136640768 is about 11689.3442074395. The cubic root of 136640768 is about 515.0626976170.

The spelling of 136640768 in words is "one hundred thirty-six million, six hundred forty thousand, seven hundred sixty-eight".