136193982491 has 16 divisors (see below), whose sum is σ = 160035068928. Its totient is φ = 113470113600.

The previous prime is 136193982433. The next prime is 136193982493. The reversal of 136193982491 is 194289391631.

It is a cyclic number.

It is not a de Polignac number, because 136193982491 - 2¹⁸ = 136193720347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136193982493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797765 + ... + 953318.

It is an arithmetic number, because the mean of its divisors is an integer number (10002191808).

Almost surely, 2^136193982491 is an apocalyptic number.

136193982491 is a deficient number, since it is larger than the sum of its proper divisors (23841086437).

136193982491 is a wasteful number, since it uses less digits than its factorization.

136193982491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751402.

The product of its digits is 2519424, while the sum is 56.

The spelling of 136193982491 in words is "one hundred thirty-six billion, one hundred ninety-three million, nine hundred eighty-two thousand, four hundred ninety-one".