686877162901 has 2 divisors, whose sum is σ = 686877162902. Its totient is φ = 686877162900.

The previous prime is 686877162841. The next prime is 686877162953. The reversal of 686877162901 is 109261778686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670104322801 + 16772840100 = 818599^2 + 129510^2 .

It is a cyclic number.

It is not a de Polignac number, because 686877162901 - 2⁷ = 686877162773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686877162901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686877162991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343438581450 + 343438581451.

It is an arithmetic number, because the mean of its divisors is an integer number (343438581451).

Almost surely, 2^686877162901 is an apocalyptic number.

It is an amenable number.

686877162901 is a deficient number, since it is larger than the sum of its proper divisors (1).

686877162901 is an equidigital number, since it uses as much as digits as its factorization.

686877162901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 686877162901 in words is "six hundred eighty-six billion, eight hundred seventy-seven million, one hundred sixty-two thousand, nine hundred one".