764661263 has 8 divisors (see below), whose sum is σ = 779500800. Its totient is φ = 749837088.

The previous prime is 764661239. The next prime is 764661301. The reversal of 764661263 is 362166467.

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 764661263 - 2¹⁴ = 764644879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 764661263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764651263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181778 + ... + 185936.

It is an arithmetic number, because the mean of its divisors is an integer number (97437600).

Almost surely, 2^764661263 is an apocalyptic number.

764661263 is a deficient number, since it is larger than the sum of its proper divisors (14839537).

764661263 is a wasteful number, since it uses less digits than its factorization.

764661263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7681.

The product of its digits is 217728, while the sum is 41.

The square root of 764661263 is about 27652.5091628228. The cubic root of 764661263 is about 914.4424178123.

The spelling of 764661263 in words is "seven hundred sixty-four million, six hundred sixty-one thousand, two hundred sixty-three".