764657749517 has 2 divisors, whose sum is σ = 764657749518. Its totient is φ = 764657749516.

The previous prime is 764657749511. The next prime is 764657749561. The reversal of 764657749517 is 715947756467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 709513090276 + 55144659241 = 842326^2 + 234829^2 .

It is an emirp because it is prime and its reverse (715947756467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 764657749517 - 2¹⁶ = 764657683981 is a prime.

It is a super-2 number, since 2×764657749517² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764657749511) 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 as a sum of consecutive naturals, namely, 382328874758 + 382328874759.

It is an arithmetic number, because the mean of its divisors is an integer number (382328874759).

Almost surely, 2^764657749517 is an apocalyptic number.

It is an amenable number.

764657749517 is a deficient number, since it is larger than the sum of its proper divisors (1).

764657749517 is an equidigital number, since it uses as much as digits as its factorization.

764657749517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311169600, while the sum is 68.

The spelling of 764657749517 in words is "seven hundred sixty-four billion, six hundred fifty-seven million, seven hundred forty-nine thousand, five hundred seventeen".