687677252752 has 60 divisors (see below), whose sum is σ = 1591794634620. Its totient is φ = 286753436928.

The previous prime is 687677252749. The next prime is 687677252803. The reversal of 687677252752 is 257252776786.

It can be written as a sum of positive squares in 2 ways, for example, as 250724524176 + 436952728576 = 500724^2 + 661024^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11824227 + ... + 11882242.

It is an arithmetic number, because the mean of its divisors is an integer number (26529910577).

Almost surely, 2^687677252752 is an apocalyptic number.

It is an amenable number.

687677252752 is an abundant number, since it is smaller than the sum of its proper divisors (904117381868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687677252752 is a wasteful number, since it uses less digits than its factorization.

687677252752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23706528 (or 23706515 counting only the distinct ones).

The product of its digits is 138297600, while the sum is 64.

The spelling of 687677252752 in words is "six hundred eighty-seven billion, six hundred seventy-seven million, two hundred fifty-two thousand, seven hundred fifty-two".