680921518515 has 48 divisors (see below), whose sum is σ = 1276223288064. Its totient is φ = 303686173440.

The previous prime is 680921518477. The next prime is 680921518517. The reversal of 680921518515 is 515815129086.

680921518515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 680921518515 - 2⁸ = 680921518259 is a prime.

It is a super-2 number, since 2×680921518515² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (680921518517) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1752397 + ... + 2105406.

It is an arithmetic number, because the mean of its divisors is an integer number (26587985168).

Almost surely, 2^680921518515 is an apocalyptic number.

680921518515 is a deficient number, since it is larger than the sum of its proper divisors (595301769549).

680921518515 is a wasteful number, since it uses less digits than its factorization.

680921518515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857900 (or 3857859 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 51.

The spelling of 680921518515 in words is "six hundred eighty billion, nine hundred twenty-one million, five hundred eighteen thousand, five hundred fifteen".