7865997535117 has 2 divisors, whose sum is σ = 7865997535118. Its totient is φ = 7865997535116.

The previous prime is 7865997535091. The next prime is 7865997535147. The reversal of 7865997535117 is 7115357995687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7772085319716 + 93912215401 = 2787846^2 + 306451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7865997535117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7865997535117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7865997535147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3932998767558 + 3932998767559.

It is an arithmetic number, because the mean of its divisors is an integer number (3932998767559).

Almost surely, 2^{7865997535117} is an apocalyptic number.

It is an amenable number.

7865997535117 is a deficient number, since it is larger than the sum of its proper divisors (1).

7865997535117 is an equidigital number, since it uses as much as digits as its factorization.

7865997535117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500094000, while the sum is 73.

The spelling of 7865997535117 in words is "seven trillion, eight hundred sixty-five billion, nine hundred ninety-seven million, five hundred thirty-five thousand, one hundred seventeen".