6990195315617 has 2 divisors, whose sum is σ = 6990195315618. Its totient is φ = 6990195315616.

The previous prime is 6990195315583. The next prime is 6990195315667. The reversal of 6990195315617 is 7165135910996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3588387644416 + 3401807671201 = 1894304^2 + 1844399^2 .

It is a cyclic number.

It is not a de Polignac number, because 6990195315617 - 2¹⁶ = 6990195250081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6990195315617.

It is not a weakly prime, because it can be changed into another prime (6990195315667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495097657808 + 3495097657809.

It is an arithmetic number, because the mean of its divisors is an integer number (3495097657809).

Almost surely, 2^{6990195315617} is an apocalyptic number.

It is an amenable number.

6990195315617 is a deficient number, since it is larger than the sum of its proper divisors (1).

6990195315617 is an equidigital number, since it uses as much as digits as its factorization.

6990195315617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13778100, while the sum is 62.

The spelling of 6990195315617 in words is "six trillion, nine hundred ninety billion, one hundred ninety-five million, three hundred fifteen thousand, six hundred seventeen".