680816562720 has 96 divisors (see below), whose sum is σ = 2450939637888. Its totient is φ = 155615213568.

The previous prime is 680816562709. The next prime is 680816562721. The reversal of 680816562720 is 27265618086.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×680816562720² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (680816562721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101308629 + ... + 101315348.

It is an arithmetic number, because the mean of its divisors is an integer number (25530621228).

Almost surely, 2^680816562720 is an apocalyptic number.

680816562720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

680816562720 is an abundant number, since it is smaller than the sum of its proper divisors (1770123075168).

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

680816562720 is a wasteful number, since it uses less digits than its factorization.

680816562720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202624002 (or 202623994 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 680816562720 in words is "six hundred eighty billion, eight hundred sixteen million, five hundred sixty-two thousand, seven hundred twenty".