687398818675 has 18 divisors (see below), whose sum is σ = 860415460268. Its totient is φ = 544779397680.

The previous prime is 687398818649. The next prime is 687398818679. The reversal of 687398818675 is 576818893786.

It is not a de Polignac number, because 687398818675 - 2¹¹ = 687398816627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687398818679) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 914577 + ... + 1487026.

Almost surely, 2^687398818675 is an apocalyptic number.

687398818675 is a deficient number, since it is larger than the sum of its proper divisors (173016641593).

687398818675 is a wasteful number, since it uses less digits than its factorization.

687398818675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401827 (or 2401715 counting only the distinct ones).

The product of its digits is 975421440, while the sum is 76.

The spelling of 687398818675 in words is "six hundred eighty-seven billion, three hundred ninety-eight million, eight hundred eighteen thousand, six hundred seventy-five".