9664791793537 has 2 divisors, whose sum is σ = 9664791793538. Its totient is φ = 9664791793536.

The previous prime is 9664791793409. The next prime is 9664791793561. The reversal of 9664791793537 is 7353971974669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9105764915776 + 559026877761 = 3017576^2 + 747681^2 .

It is a cyclic number.

It is not a de Polignac number, because 9664791793537 - 2⁷ = 9664791793409 is a prime.

It is not a weakly prime, because it can be changed into another prime (9664791703537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832395896768 + 4832395896769.

It is an arithmetic number, because the mean of its divisors is an integer number (4832395896769).

Almost surely, 2^{9664791793537} is an apocalyptic number.

It is an amenable number.

9664791793537 is a deficient number, since it is larger than the sum of its proper divisors (1).

9664791793537 is an equidigital number, since it uses as much as digits as its factorization.

9664791793537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620304560, while the sum is 76.

The spelling of 9664791793537 in words is "nine trillion, six hundred sixty-four billion, seven hundred ninety-one million, seven hundred ninety-three thousand, five hundred thirty-seven".