765811864 has 16 divisors (see below), whose sum is σ = 1498327920. Its totient is φ = 366257760.

The previous prime is 765811847. The next prime is 765811877. The reversal of 765811864 is 468118567.

765811864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×765811864² = 1172935622086308992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2080827 + ... + 2081194.

It is an arithmetic number, because the mean of its divisors is an integer number (93645495).

Almost surely, 2^765811864 is an apocalyptic number.

It is an amenable number.

765811864 is a deficient number, since it is larger than the sum of its proper divisors (732516056).

765811864 is a wasteful number, since it uses less digits than its factorization.

765811864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162050 (or 4162046 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 765811864 is about 27673.3059824807. The cubic root of 765811864 is about 914.9008478463.

The spelling of 765811864 in words is "seven hundred sixty-five million, eight hundred eleven thousand, eight hundred sixty-four".