688137639366 has 32 divisors (see below), whose sum is σ = 1384182432000. Its totient is φ = 228061759520.

The previous prime is 688137639359. The next prime is 688137639401. The reversal of 688137639366 is 663936731886.

It is a super-2 number, since 2×688137639366² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 688137639297 and 688137639306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7246360 + ... + 7340708.

It is an arithmetic number, because the mean of its divisors is an integer number (43255701000).

Almost surely, 2^688137639366 is an apocalyptic number.

688137639366 is an abundant number, since it is smaller than the sum of its proper divisors (696044792634).

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

688137639366 is a wasteful number, since it uses less digits than its factorization.

688137639366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101324.

The product of its digits is 141087744, while the sum is 66.

The spelling of 688137639366 in words is "six hundred eighty-eight billion, one hundred thirty-seven million, six hundred thirty-nine thousand, three hundred sixty-six".