136857665 has 32 divisors (see below), whose sum is σ = 199203840. Its totient is φ = 88171200.

The previous prime is 136857661. The next prime is 136857671. The reversal of 136857665 is 566758631.

It is not a de Polignac number, because 136857665 - 2² = 136857661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136857661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86330 + ... + 87900.

It is an arithmetic number, because the mean of its divisors is an integer number (6225120).

Almost surely, 2^136857665 is an apocalyptic number.

It is an amenable number.

136857665 is a deficient number, since it is larger than the sum of its proper divisors (62346175).

136857665 is a wasteful number, since it uses less digits than its factorization.

136857665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733.

The product of its digits is 907200, while the sum is 47.

The square root of 136857665 is about 11698.6180807820. The cubic root of 136857665 is about 515.3350821500.

The spelling of 136857665 in words is "one hundred thirty-six million, eight hundred fifty-seven thousand, six hundred sixty-five".