764864545 has 8 divisors (see below), whose sum is σ = 918251496. Its totient is φ = 611615616.

The previous prime is 764864537. The next prime is 764864549. The reversal of 764864545 is 545468467.

It can be written as a sum of positive squares in 4 ways, for example, as 117874449 + 646990096 = 10857^2 + 25436^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 764864545 - 2³ = 764864537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764864549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21892 + ... + 44821.

It is an arithmetic number, because the mean of its divisors is an integer number (114781437).

Almost surely, 2^764864545 is an apocalyptic number.

It is an amenable number.

764864545 is a deficient number, since it is larger than the sum of its proper divisors (153386951).

764864545 is a wasteful number, since it uses less digits than its factorization.

764864545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69011.

The product of its digits is 3225600, while the sum is 49.

The square root of 764864545 is about 27656.1845705441. The cubic root of 764864545 is about 914.5234441971.

The spelling of 764864545 in words is "seven hundred sixty-four million, eight hundred sixty-four thousand, five hundred forty-five".