136921689695 has 32 divisors (see below), whose sum is σ = 191337638400. Its totient is φ = 92115778176.

The previous prime is 136921689691. The next prime is 136921689743. The reversal of 136921689695 is 596986129631.

It is a cyclic number.

It is not a de Polignac number, because 136921689695 - 2² = 136921689691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136921689691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 985952 + ... + 1116218.

It is an arithmetic number, because the mean of its divisors is an integer number (5979301200).

Almost surely, 2^136921689695 is an apocalyptic number.

136921689695 is a deficient number, since it is larger than the sum of its proper divisors (54415948705).

136921689695 is a wasteful number, since it uses less digits than its factorization.

136921689695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130847.

The product of its digits is 37791360, while the sum is 65.

The spelling of 136921689695 in words is "one hundred thirty-six billion, nine hundred twenty-one million, six hundred eighty-nine thousand, six hundred ninety-five".