764438013133 has 4 divisors (see below), whose sum is σ = 809404955100. Its totient is φ = 719471071168.

The previous prime is 764438013113. The next prime is 764438013197. The reversal of 764438013133 is 331310834467.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 248803435204 + 515634577929 = 498802^2 + 718077^2 .

It is a cyclic number.

It is not a de Polignac number, because 764438013133 - 2⁹ = 764438012621 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 764438013133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764438013113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22483470958 + ... + 22483470991.

It is an arithmetic number, because the mean of its divisors is an integer number (202351238775).

Almost surely, 2^764438013133 is an apocalyptic number.

It is an amenable number.

764438013133 is a deficient number, since it is larger than the sum of its proper divisors (44966941967).

764438013133 is a wasteful number, since it uses less digits than its factorization.

764438013133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44966941966.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 764438013133 in words is "seven hundred sixty-four billion, four hundred thirty-eight million, thirteen thousand, one hundred thirty-three".