136921568 has 24 divisors (see below), whose sum is σ = 308074032. Its totient is φ = 58680576.

The previous prime is 136921483. The next prime is 136921573. The reversal of 136921568 is 865129631.

It is a congruent number.

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, 305405 + ... + 305852.

It is an arithmetic number, because the mean of its divisors is an integer number (12836418).

Almost surely, 2^136921568 is an apocalyptic number.

It is an amenable number.

136921568 is an abundant number, since it is smaller than the sum of its proper divisors (171152464).

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

136921568 is an equidigital number, since it uses as much as digits as its factorization.

136921568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611274 (or 611266 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 136921568 is about 11701.3489820619. The cubic root of 136921568 is about 515.4152782026.

The spelling of 136921568 in words is "one hundred thirty-six million, nine hundred twenty-one thousand, five hundred sixty-eight".