136868278 has 4 divisors (see below), whose sum is σ = 205302420. Its totient is φ = 68434138.

The previous prime is 136868273. The next prime is 136868287. The reversal of 136868278 is 872868631.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136868273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34217068 + ... + 34217071.

It is an arithmetic number, because the mean of its divisors is an integer number (51325605).

Almost surely, 2^136868278 is an apocalyptic number.

136868278 is a deficient number, since it is larger than the sum of its proper divisors (68434142).

136868278 is an equidigital number, since it uses as much as digits as its factorization.

136868278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68434141.

The product of its digits is 774144, while the sum is 49.

The square root of 136868278 is about 11699.0716725730. The cubic root of 136868278 is about 515.3484028260.

The spelling of 136868278 in words is "one hundred thirty-six million, eight hundred sixty-eight thousand, two hundred seventy-eight".