136165978 has 16 divisors (see below), whose sum is σ = 222142536. Its totient is φ = 62222400.

The previous prime is 136165973. The next prime is 136165979. The reversal of 136165978 is 879561631.

It is a happy number.

136165978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 136118889 + 47089 = 11667^2 + 217^2 .

It is not an unprimeable number, because it can be changed into a prime (136165973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23301 + ... + 28552.

Almost surely, 2^136165978 is an apocalyptic number.

136165978 is a deficient number, since it is larger than the sum of its proper divisors (85976558).

136165978 is a wasteful number, since it uses less digits than its factorization.

136165978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51969.

The product of its digits is 272160, while the sum is 46.

The square root of 136165978 is about 11669.0178678413. The cubic root of 136165978 is about 514.4654370910.

The spelling of 136165978 in words is "one hundred thirty-six million, one hundred sixty-five thousand, nine hundred seventy-eight".