768601691 has 18 divisors (see below), whose sum is σ = 909348228. Its totient is φ = 643977360.

The previous prime is 768601679. The next prime is 768601697. The reversal of 768601691 is 196106867.

It is not a de Polignac number, because 768601691 - 2²² = 764407387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768601697) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1195016 + ... + 1195658.

It is an arithmetic number, because the mean of its divisors is an integer number (50519346).

Almost surely, 2^768601691 is an apocalyptic number.

768601691 is a deficient number, since it is larger than the sum of its proper divisors (140746537).

768601691 is an equidigital number, since it uses as much as digits as its factorization.

768601691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 768601691 is about 27723.6666225808. Note that the first 4 decimals coincide. The cubic root of 768601691 is about 916.0104858706.

Multiplying 768601691 by its sum of digits (44), we get a square (33818474404 = 183898²).

The spelling of 768601691 in words is "seven hundred sixty-eight million, six hundred one thousand, six hundred ninety-one".