768644465 has 16 divisors (see below), whose sum is σ = 934243200. Its totient is φ = 607052160.

The previous prime is 768644417. The next prime is 768644543. The reversal of 768644465 is 564446867.

768644465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-768644465 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127397 + ... + 133293.

It is an arithmetic number, because the mean of its divisors is an integer number (58390200).

Almost surely, 2^768644465 is an apocalyptic number.

It is an amenable number.

768644465 is a deficient number, since it is larger than the sum of its proper divisors (165598735).

768644465 is a wasteful number, since it uses less digits than its factorization.

768644465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232.

The product of its digits is 3870720, while the sum is 50.

The square root of 768644465 is about 27724.4380466043. The cubic root of 768644465 is about 916.0274780726.

The spelling of 768644465 in words is "seven hundred sixty-eight million, six hundred forty-four thousand, four hundred sixty-five".