765540045 has 64 divisors (see below), whose sum is σ = 1393459200. Its totient is φ = 398640960.

The previous prime is 765540037. The next prime is 765540049. The reversal of 765540045 is 540045567.

It is a happy number.

765540045 is a `hidden beast` number, since 76 + 5 + 540 + 0 + 45 = 666.

765540045 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 765540045 - 2³ = 765540037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 765539991 and 765540009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765540049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1775980 + ... + 1776410.

It is an arithmetic number, because the mean of its divisors is an integer number (21772800).

Almost surely, 2^765540045 is an apocalyptic number.

It is an amenable number.

765540045 is a deficient number, since it is larger than the sum of its proper divisors (627919155).

765540045 is a wasteful number, since it uses less digits than its factorization.

765540045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 765540045 is about 27668.3943336074. The cubic root of 765540045 is about 914.7925893761.

The spelling of 765540045 in words is "seven hundred sixty-five million, five hundred forty thousand, forty-five".