207716815161 has 12 divisors (see below), whose sum is σ = 301150776420. Its totient is φ = 137963087520.

The previous prime is 207716815139. The next prime is 207716815177. The reversal of 207716815161 is 161518617702.

207716815161 is a `hidden beast` number, since 2 + 0 + 7 + 71 + 68 + 1 + 516 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 98945477136 + 108771338025 = 314556^2 + 329805^2 .

It is not a de Polignac number, because 207716815161 - 2⁵ = 207716815129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207716815121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42896550 + ... + 42901391.

It is an arithmetic number, because the mean of its divisors is an integer number (25095898035).

Almost surely, 2^207716815161 is an apocalyptic number.

It is an amenable number.

207716815161 is a deficient number, since it is larger than the sum of its proper divisors (93433961259).

207716815161 is a wasteful number, since it uses less digits than its factorization.

207716815161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85798216 (or 85798213 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 207716815161 in words is "two hundred seven billion, seven hundred sixteen million, eight hundred fifteen thousand, one hundred sixty-one".