136291478 has 16 divisors (see below), whose sum is σ = 207567360. Its totient is φ = 67107816.

The previous prime is 136291471. The next prime is 136291489. The reversal of 136291478 is 874192631.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136291471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58451 + ... + 60737.

It is an arithmetic number, because the mean of its divisors is an integer number (12972960).

Almost surely, 2^136291478 is an apocalyptic number.

136291478 is a deficient number, since it is larger than the sum of its proper divisors (71275882).

136291478 is a wasteful number, since it uses less digits than its factorization.

136291478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731.

The product of its digits is 72576, while the sum is 41.

The square root of 136291478 is about 11674.3941170409. The cubic root of 136291478 is about 514.6234442219.

The spelling of 136291478 in words is "one hundred thirty-six million, two hundred ninety-one thousand, four hundred seventy-eight".