136847636681 has 32 divisors (see below), whose sum is σ = 165507729408. Its totient is φ = 110615218560.

The previous prime is 136847636669. The next prime is 136847636689. The reversal of 136847636681 is 186636748631.

It is not a de Polignac number, because 136847636681 - 2⁶ = 136847636617 is a prime.

It is a super-2 number, since 2×136847636681² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 136847636681.

It is not an unprimeable number, because it can be changed into a prime (136847636689) 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, 6550805 + ... + 6571661.

It is an arithmetic number, because the mean of its divisors is an integer number (5172116544).

Almost surely, 2^136847636681 is an apocalyptic number.

It is an amenable number.

136847636681 is a deficient number, since it is larger than the sum of its proper divisors (28660092727).

136847636681 is a wasteful number, since it uses less digits than its factorization.

136847636681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21461.

The product of its digits is 20901888, while the sum is 59.

The spelling of 136847636681 in words is "one hundred thirty-six billion, eight hundred forty-seven million, six hundred thirty-six thousand, six hundred eighty-one".