136826781807 has 4 divisors (see below), whose sum is σ = 182435709080. Its totient is φ = 91217854536.

The previous prime is 136826781787. The next prime is 136826781809. The reversal of 136826781807 is 708187628631.

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

It is not a de Polignac number, because 136826781807 - 2²³ = 136818393199 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 (136826781809) 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, 22804463632 + ... + 22804463637.

It is an arithmetic number, because the mean of its divisors is an integer number (45608927270).

Almost surely, 2^136826781807 is an apocalyptic number.

136826781807 is a deficient number, since it is larger than the sum of its proper divisors (45608927273).

136826781807 is an equidigital number, since it uses as much as digits as its factorization.

136826781807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45608927272.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 136826781807 in words is "one hundred thirty-six billion, eight hundred twenty-six million, seven hundred eighty-one thousand, eight hundred seven".