136888069581 has 8 divisors (see below), whose sum is σ = 202797140160. Its totient is φ = 91258713036.

The previous prime is 136888069561. The next prime is 136888069583. The reversal of 136888069581 is 185960888631.

It is not a de Polignac number, because 136888069581 - 2⁶ = 136888069517 is a prime.

It is a super-2 number, since 2×136888069581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136888069583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2534964225 + ... + 2534964278.

It is an arithmetic number, because the mean of its divisors is an integer number (25349642520).

Almost surely, 2^136888069581 is an apocalyptic number.

It is an amenable number.

136888069581 is a deficient number, since it is larger than the sum of its proper divisors (65909070579).

136888069581 is an equidigital number, since it uses as much as digits as its factorization.

136888069581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5069928512 (or 5069928506 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 63.

The spelling of 136888069581 in words is "one hundred thirty-six billion, eight hundred eighty-eight million, sixty-nine thousand, five hundred eighty-one".