136797571665 has 24 divisors (see below), whose sum is σ = 237832178688. Its totient is φ = 72738277920.

The previous prime is 136797571639. The next prime is 136797571693. The reversal of 136797571665 is 566175797631.

It is a happy number.

It is not a de Polignac number, because 136797571665 - 2¹⁸ = 136797309521 is a prime.

It is a super-2 number, since 2×136797571665² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4577169 + ... + 4606958.

It is an arithmetic number, because the mean of its divisors is an integer number (9909674112).

Almost surely, 2^136797571665 is an apocalyptic number.

136797571665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136797571665 is a deficient number, since it is larger than the sum of its proper divisors (101034607023).

136797571665 is a wasteful number, since it uses less digits than its factorization.

136797571665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9184469 (or 9184466 counting only the distinct ones).

The product of its digits is 50009400, while the sum is 63.

The spelling of 136797571665 in words is "one hundred thirty-six billion, seven hundred ninety-seven million, five hundred seventy-one thousand, six hundred sixty-five".