136899265647 has 4 divisors (see below), whose sum is σ = 182532354200. Its totient is φ = 91266177096.

The previous prime is 136899265637. The next prime is 136899265649. The reversal of 136899265647 is 746562998631.

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

It is a de Polignac number, because none of the positive numbers 2^k-136899265647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136899265649) 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, 22816544272 + ... + 22816544277.

It is an arithmetic number, because the mean of its divisors is an integer number (45633088550).

Almost surely, 2^136899265647 is an apocalyptic number.

136899265647 is a deficient number, since it is larger than the sum of its proper divisors (45633088553).

136899265647 is an equidigital number, since it uses as much as digits as its factorization.

136899265647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45633088552.

The product of its digits is 117573120, while the sum is 66.

The spelling of 136899265647 in words is "one hundred thirty-six billion, eight hundred ninety-nine million, two hundred sixty-five thousand, six hundred forty-seven".