136744778 has 4 divisors (see below), whose sum is σ = 205117170. Its totient is φ = 68372388.

The previous prime is 136744763. The next prime is 136744807. The reversal of 136744778 is 877447631.

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

It can be written as a sum of positive squares in only one way, i.e., 98267569 + 38477209 = 9913^2 + 6203^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34186193 + ... + 34186196.

Almost surely, 2^136744778 is an apocalyptic number.

136744778 is a deficient number, since it is larger than the sum of its proper divisors (68372392).

136744778 is an equidigital number, since it uses as much as digits as its factorization.

136744778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68372391.

The product of its digits is 790272, while the sum is 47.

The square root of 136744778 is about 11693.7922847979. The cubic root of 136744778 is about 515.1933518497.

The spelling of 136744778 in words is "one hundred thirty-six million, seven hundred forty-four thousand, seven hundred seventy-eight".