764075507221 has 32 divisors (see below), whose sum is σ = 880096912128. Its totient is φ = 657785525760.

The previous prime is 764075507219. The next prime is 764075507227. The reversal of 764075507221 is 122705570467.

It is a cyclic number.

It is not a de Polignac number, because 764075507221 - 2¹ = 764075507219 is a prime.

It is a super-2 number, since 2×764075507221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764075507227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21398635 + ... + 21434311.

It is an arithmetic number, because the mean of its divisors is an integer number (27503028504).

Almost surely, 2^764075507221 is an apocalyptic number.

It is an amenable number.

764075507221 is a deficient number, since it is larger than the sum of its proper divisors (116021404907).

764075507221 is a wasteful number, since it uses less digits than its factorization.

764075507221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37501.

The product of its (nonzero) digits is 823200, while the sum is 46.

The spelling of 764075507221 in words is "seven hundred sixty-four billion, seventy-five million, five hundred seven thousand, two hundred twenty-one".