136746804685 has 4 divisors (see below), whose sum is σ = 164096165628. Its totient is φ = 109397443744.

The previous prime is 136746804671. The next prime is 136746804709. The reversal of 136746804685 is 586408647631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586408647631 = 4621 ⋅126900811.

It can be written as a sum of positive squares in 2 ways, for example, as 22016921161 + 114729883524 = 148381^2 + 338718^2 .

It is a cyclic number.

It is not a de Polignac number, because 136746804685 - 2²⁵ = 136713250253 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13674680464 + ... + 13674680473.

It is an arithmetic number, because the mean of its divisors is an integer number (41024041407).

Almost surely, 2^136746804685 is an apocalyptic number.

It is an amenable number.

136746804685 is a deficient number, since it is larger than the sum of its proper divisors (27349360943).

136746804685 is an equidigital number, since it uses as much as digits as its factorization.

136746804685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27349360942.

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 136746804685 in words is "one hundred thirty-six billion, seven hundred forty-six million, eight hundred four thousand, six hundred eighty-five".