68171864769 has 12 divisors (see below), whose sum is σ = 100872190692. Its totient is φ = 44339424000.

The previous prime is 68171864767. The next prime is 68171864819. The reversal of 68171864769 is 96746817186.

68171864769 is a `hidden beast` number, since 6 + 81 + 7 + 1 + 86 + 476 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34600464144 + 33571400625 = 186012^2 + 183225^2 .

It is not a de Polignac number, because 68171864769 - 2¹ = 68171864767 is a prime.

It is a super-2 number, since 2×68171864769² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68171864767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92373432 + ... + 92374169.

It is an arithmetic number, because the mean of its divisors is an integer number (8406015891).

Almost surely, 2^68171864769 is an apocalyptic number.

It is an amenable number.

68171864769 is a deficient number, since it is larger than the sum of its proper divisors (32700325923).

68171864769 is a wasteful number, since it uses less digits than its factorization.

68171864769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184747648 (or 184747645 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The spelling of 68171864769 in words is "sixty-eight billion, one hundred seventy-one million, eight hundred sixty-four thousand, seven hundred sixty-nine".