136785713537 has 4 divisors (see below), whose sum is σ = 149220778416. Its totient is φ = 124350648660.

The previous prime is 136785713483. The next prime is 136785713569. The reversal of 136785713537 is 735317587631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136785713537 - 2²² = 136781519233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136785713587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6217532423 + ... + 6217532444.

It is an arithmetic number, because the mean of its divisors is an integer number (37305194604).

Almost surely, 2^136785713537 is an apocalyptic number.

It is an amenable number.

136785713537 is a deficient number, since it is larger than the sum of its proper divisors (12435064879).

136785713537 is a wasteful number, since it uses less digits than its factorization.

136785713537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12435064878.

The product of its digits is 11113200, while the sum is 56.

The spelling of 136785713537 in words is "one hundred thirty-six billion, seven hundred eighty-five million, seven hundred thirteen thousand, five hundred thirty-seven".