768916491 has 16 divisors (see below), whose sum is σ = 1233350400. Its totient is φ = 416255328.

The previous prime is 768916481. The next prime is 768916493. The reversal of 768916491 is 194619867.

It is a happy number.

It is not a de Polignac number, because 768916491 - 2⁵ = 768916459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (768916493) 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, 963156 + ... + 963953.

It is an arithmetic number, because the mean of its divisors is an integer number (77084400).

Almost surely, 2^768916491 is an apocalyptic number.

768916491 is a deficient number, since it is larger than the sum of its proper divisors (464433909).

768916491 is a wasteful number, since it uses less digits than its factorization.

768916491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927138.

The product of its digits is 653184, while the sum is 51.

The square root of 768916491 is about 27729.3435010640. The cubic root of 768916491 is about 916.1355271175.

The spelling of 768916491 in words is "seven hundred sixty-eight million, nine hundred sixteen thousand, four hundred ninety-one".