136367308778 has 4 divisors (see below), whose sum is σ = 204550963170. Its totient is φ = 68183654388.

The previous prime is 136367308751. The next prime is 136367308787. The reversal of 136367308778 is 877803763631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877803763631 = 68947 ⋅12731573.

It can be written as a sum of positive squares in only one way, i.e., 109470324769 + 26896984009 = 330863^2 + 164003^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34091827193 + ... + 34091827196.

Almost surely, 2^136367308778 is an apocalyptic number.

136367308778 is a deficient number, since it is larger than the sum of its proper divisors (68183654392).

136367308778 is an equidigital number, since it uses as much as digits as its factorization.

136367308778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68183654391.

The product of its (nonzero) digits is 21337344, while the sum is 59.

The spelling of 136367308778 in words is "one hundred thirty-six billion, three hundred sixty-seven million, three hundred eight thousand, seven hundred seventy-eight".