9646540268537 has 2 divisors, whose sum is σ = 9646540268538. Its totient is φ = 9646540268536.

The previous prime is 9646540268513. The next prime is 9646540268551. The reversal of 9646540268537 is 7358620456469.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9573430057216 + 73110211321 = 3094096^2 + 270389^2 .

It is a cyclic number.

It is not a de Polignac number, because 9646540268537 - 2⁶ = 9646540268473 is a prime.

It is not a weakly prime, because it can be changed into another prime (9646540267537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4823270134268 + 4823270134269.

It is an arithmetic number, because the mean of its divisors is an integer number (4823270134269).

Almost surely, 2^{9646540268537} is an apocalyptic number.

It is an amenable number.

9646540268537 is a deficient number, since it is larger than the sum of its proper divisors (1).

9646540268537 is an equidigital number, since it uses as much as digits as its factorization.

9646540268537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 261273600, while the sum is 65.

The spelling of 9646540268537 in words is "nine trillion, six hundred forty-six billion, five hundred forty million, two hundred sixty-eight thousand, five hundred thirty-seven".