136171517781 has 16 divisors (see below), whose sum is σ = 196823231360. Its totient is φ = 83242900800.

The previous prime is 136171517747. The next prime is 136171517789. The reversal of 136171517781 is 187715171631.

It is not a de Polignac number, because 136171517781 - 2¹⁵ = 136171485013 is a prime.

It is a super-2 number, since 2×136171517781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136171517781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136171517789) 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 15 ways as a sum of consecutive naturals, for example, 11555626 + ... + 11567403.

It is an arithmetic number, because the mean of its divisors is an integer number (12301451960).

Almost surely, 2^136171517781 is an apocalyptic number.

It is an amenable number.

136171517781 is a deficient number, since it is larger than the sum of its proper divisors (60651713579).

136171517781 is a wasteful number, since it uses less digits than its factorization.

136171517781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23123196.

The product of its digits is 246960, while the sum is 48.

The spelling of 136171517781 in words is "one hundred thirty-six billion, one hundred seventy-one million, five hundred seventeen thousand, seven hundred eighty-one".