136661265 has 24 divisors (see below), whose sum is σ = 255102120. Its totient is φ = 67279104.

The previous prime is 136661233. The next prime is 136661293. The reversal of 136661265 is 562166631.

It can be written as a sum of positive squares in 4 ways, for example, as 6906384 + 129754881 = 2628^2 + 11391^2 .

It is not a de Polignac number, because 136661265 - 2⁵ = 136661233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116220 + ... + 117389.

It is an arithmetic number, because the mean of its divisors is an integer number (10629255).

Almost surely, 2^136661265 is an apocalyptic number.

136661265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136661265 is a deficient number, since it is larger than the sum of its proper divisors (118440855).

136661265 is a wasteful number, since it uses less digits than its factorization.

136661265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233633 (or 233630 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 136661265 is about 11690.2209132249. The cubic root of 136661265 is about 515.0884505759.

The spelling of 136661265 in words is "one hundred thirty-six million, six hundred sixty-one thousand, two hundred sixty-five".