136645733644181 has 32 divisors (see below), whose sum is σ = 143644596480000. Its totient is φ = 129882534582528.

The previous prime is 136645733644159. The next prime is 136645733644213. The reversal of 136645733644181 is 181446337546631.

It is a cyclic number.

It is not a de Polignac number, because 136645733644181 - 2²² = 136645729449877 is a prime.

It is a super-2 number, since 2×136645733644181² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136645733644481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67716770 + ... + 69705468.

It is an arithmetic number, because the mean of its divisors is an integer number (4488893640000).

Almost surely, 2^{136645733644181} is an apocalyptic number.

It is an amenable number.

136645733644181 is a deficient number, since it is larger than the sum of its proper divisors (6998862835819).

136645733644181 is a wasteful number, since it uses less digits than its factorization.

136645733644181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989113.

The product of its digits is 104509440, while the sum is 62.

The spelling of 136645733644181 in words is "one hundred thirty-six trillion, six hundred forty-five billion, seven hundred thirty-three million, six hundred forty-four thousand, one hundred eighty-one".