764641525 has 12 divisors (see below), whose sum is σ = 955080612. Its totient is φ = 607245440.

The previous prime is 764641511. The next prime is 764641561. The reversal of 764641525 is 525146467.

It is a happy number.

764641525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 3378244 + 761263281 = 1838^2 + 27591^2 .

It is not a de Polignac number, because 764641525 - 2⁹ = 764641013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108202 + ... + 115051.

It is an arithmetic number, because the mean of its divisors is an integer number (79590051).

Almost surely, 2^764641525 is an apocalyptic number.

It is an amenable number.

764641525 is a deficient number, since it is larger than the sum of its proper divisors (190439087).

764641525 is a wasteful number, since it uses less digits than its factorization.

764641525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223400 (or 223395 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 764641525 is about 27652.1522670479. The cubic root of 764641525 is about 914.4345496574.

The spelling of 764641525 in words is "seven hundred sixty-four million, six hundred forty-one thousand, five hundred twenty-five".