136639756 has 24 divisors (see below), whose sum is σ = 265139280. Its totient is φ = 61089600.

The previous prime is 136639753. The next prime is 136639759. The reversal of 136639756 is 657936631.

It is an interprime number because it is at equal distance from previous prime (136639753) and next prime (136639759).

It is not an unprimeable number, because it can be changed into a prime (136639753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22771 + ... + 28138.

It is an arithmetic number, because the mean of its divisors is an integer number (11047470).

Almost surely, 2^136639756 is an apocalyptic number.

It is an amenable number.

136639756 is a deficient number, since it is larger than the sum of its proper divisors (128499524).

136639756 is a wasteful number, since it uses less digits than its factorization.

136639756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50985 (or 50983 counting only the distinct ones).

The product of its digits is 612360, while the sum is 46.

The square root of 136639756 is about 11689.3009200722. The cubic root of 136639756 is about 515.0614260474.

The spelling of 136639756 in words is "one hundred thirty-six million, six hundred thirty-nine thousand, seven hundred fifty-six".