2647947135817 has 2 divisors, whose sum is σ = 2647947135818. Its totient is φ = 2647947135816.

The previous prime is 2647947135787. The next prime is 2647947135829. The reversal of 2647947135817 is 7185317497462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2584815045696 + 63132090121 = 1607736^2 + 251261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2647947135817 is a prime.

It is not a weakly prime, because it can be changed into another prime (2647947135017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323973567908 + 1323973567909.

It is an arithmetic number, because the mean of its divisors is an integer number (1323973567909).

Almost surely, 2^{2647947135817} is an apocalyptic number.

It is an amenable number.

2647947135817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2647947135817 is an equidigital number, since it uses as much as digits as its factorization.

2647947135817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71124480, while the sum is 64.

The spelling of 2647947135817 in words is "two trillion, six hundred forty-seven billion, nine hundred forty-seven million, one hundred thirty-five thousand, eight hundred seventeen".