136726385 has 8 divisors (see below), whose sum is σ = 164225256. Its totient is φ = 109278720.

The previous prime is 136726367. The next prime is 136726391. The reversal of 136726385 is 583627631.

It can be written as a sum of positive squares in 4 ways, for example, as 12559936 + 124166449 = 3544^2 + 11143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136726385 - 2⁸ = 136726129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6656 + ... + 17825.

It is an arithmetic number, because the mean of its divisors is an integer number (20528157).

Almost surely, 2^136726385 is an apocalyptic number.

It is an amenable number.

136726385 is a deficient number, since it is larger than the sum of its proper divisors (27498871).

136726385 is a wasteful number, since it uses less digits than its factorization.

136726385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25603.

The product of its digits is 181440, while the sum is 41.

The square root of 136726385 is about 11693.0058154437. The cubic root of 136726385 is about 515.1702519397.

The spelling of 136726385 in words is "one hundred thirty-six million, seven hundred twenty-six thousand, three hundred eighty-five".