136331132785 has 4 divisors (see below), whose sum is σ = 163597359348. Its totient is φ = 109064906224.

The previous prime is 136331132711. The next prime is 136331132789. The reversal of 136331132785 is 587231133631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587231133631 = 79 ⋅7433305489.

It can be written as a sum of positive squares in 2 ways, for example, as 29548578609 + 106782554176 = 171897^2 + 326776^2 .

It is a cyclic number.

It is not a de Polignac number, because 136331132785 - 2¹⁹ = 136330608497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136331132789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13633113274 + ... + 13633113283.

It is an arithmetic number, because the mean of its divisors is an integer number (40899339837).

Almost surely, 2^136331132785 is an apocalyptic number.

It is an amenable number.

136331132785 is a deficient number, since it is larger than the sum of its proper divisors (27266226563).

136331132785 is an equidigital number, since it uses as much as digits as its factorization.

136331132785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27266226562.

The product of its digits is 272160, while the sum is 43.

The spelling of 136331132785 in words is "one hundred thirty-six billion, three hundred thirty-one million, one hundred thirty-two thousand, seven hundred eighty-five".