765221063 has 16 divisors (see below), whose sum is σ = 806547456. Its totient is φ = 724611360.

The previous prime is 765221033. The next prime is 765221071. The reversal of 765221063 is 360122567.

It is a cyclic number.

It is not a de Polignac number, because 765221063 - 2²² = 761026759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765221033) 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, 1638356 + ... + 1638822.

It is an arithmetic number, because the mean of its divisors is an integer number (50409216).

Almost surely, 2^765221063 is an apocalyptic number.

765221063 is a deficient number, since it is larger than the sum of its proper divisors (41326393).

765221063 is a wasteful number, since it uses less digits than its factorization.

765221063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 765221063 is about 27662.6293580346. The cubic root of 765221063 is about 914.6655144177.

The spelling of 765221063 in words is "seven hundred sixty-five million, two hundred twenty-one thousand, sixty-three".