136644436 has 24 divisors (see below), whose sum is σ = 253967616. Its totient is φ = 64106880.

The previous prime is 136644427. The next prime is 136644437. The reversal of 136644436 is 634446631.

It is a junction number, because it is equal to n+sod(n) for n = 136644395 and 136644404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136644437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20701 + ... + 26491.

It is an arithmetic number, because the mean of its divisors is an integer number (10581984).

Almost surely, 2^136644436 is an apocalyptic number.

It is an amenable number.

136644436 is a deficient number, since it is larger than the sum of its proper divisors (117323180).

136644436 is a wasteful number, since it uses less digits than its factorization.

136644436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6159 (or 6157 counting only the distinct ones).

The product of its digits is 124416, while the sum is 37.

The square root of 136644436 is about 11689.5011014157. The cubic root of 136644436 is about 515.0673063759.

The spelling of 136644436 in words is "one hundred thirty-six million, six hundred forty-four thousand, four hundred thirty-six".