686233880577 has 42 divisors (see below), whose sum is σ = 1196860648338. Its totient is φ = 392133625632.

The previous prime is 686233880573. The next prime is 686233880581. The reversal of 686233880577 is 775088332686.

It is a happy number.

686233880577 is a `hidden beast` number, since 6 + 8 + 6 + 23 + 38 + 8 + 0 + 577 = 666.

It is an interprime number because it is at equal distance from previous prime (686233880573) and next prime (686233880581).

It can be written as a sum of positive squares in only one way, i.e., 660788526321 + 25445354256 = 812889^2 + 159516^2 .

It is not a de Polignac number, because 686233880577 - 2² = 686233880573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (686233880573) 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 41 ways as a sum of consecutive naturals, for example, 9569748 + ... + 9641189.

Almost surely, 2^686233880577 is an apocalyptic number.

It is an amenable number.

686233880577 is a deficient number, since it is larger than the sum of its proper divisors (510626767761).

686233880577 is an equidigital number, since it uses as much as digits as its factorization.

686233880577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19210969 (or 19210947 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 63.

The spelling of 686233880577 in words is "six hundred eighty-six billion, two hundred thirty-three million, eight hundred eighty thousand, five hundred seventy-seven".