680920916265 has 80 divisors (see below), whose sum is σ = 1293129826560. Its totient is φ = 341606453760.

The previous prime is 680920916251. The next prime is 680920916279. The reversal of 680920916265 is 562619029086.

It is a happy number.

680920916265 is a `hidden beast` number, since 6 + 8 + 0 + 9 + 2 + 0 + 9 + 1 + 626 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (680920916251) and next prime (680920916279).

It is not a de Polignac number, because 680920916265 - 2¹⁵ = 680920883497 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12855406 + ... + 12908264.

It is an arithmetic number, because the mean of its divisors is an integer number (16164122832).

Almost surely, 2^680920916265 is an apocalyptic number.

It is an amenable number.

680920916265 is a deficient number, since it is larger than the sum of its proper divisors (612208910295).

680920916265 is a wasteful number, since it uses less digits than its factorization.

680920916265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54764 (or 54755 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 680920916265 in words is "six hundred eighty billion, nine hundred twenty million, nine hundred sixteen thousand, two hundred sixty-five".