765500640 has 48 divisors (see below), whose sum is σ = 2411328528. Its totient is φ = 204133376.

The previous prime is 765500597. The next prime is 765500641. The reversal of 765500640 is 46005567.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765500641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796917 + ... + 797876.

It is an arithmetic number, because the mean of its divisors is an integer number (50236011).

Almost surely, 2^765500640 is an apocalyptic number.

It is an amenable number.

765500640 is an abundant number, since it is smaller than the sum of its proper divisors (1645827888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

765500640 is a wasteful number, since it uses less digits than its factorization.

765500640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594811 (or 1594803 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 765500640 is about 27667.6822303568. The cubic root of 765500640 is about 914.7768932582.

The spelling of 765500640 in words is "seven hundred sixty-five million, five hundred thousand, six hundred forty".