7117490815681 has 2 divisors, whose sum is σ = 7117490815682. Its totient is φ = 7117490815680.

The previous prime is 7117490815583. The next prime is 7117490815709. The reversal of 7117490815681 is 1865180947117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7073551948225 + 43938867456 = 2659615^2 + 209616^2 .

It is a cyclic number.

It is not a de Polignac number, because 7117490815681 - 2¹³ = 7117490807489 is a prime.

It is a super-2 number, since 2×7117490815681² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7117490815181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3558745407840 + 3558745407841.

It is an arithmetic number, because the mean of its divisors is an integer number (3558745407841).

Almost surely, 2^{7117490815681} is an apocalyptic number.

It is an amenable number.

7117490815681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7117490815681 is an equidigital number, since it uses as much as digits as its factorization.

7117490815681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 58.

The spelling of 7117490815681 in words is "seven trillion, one hundred seventeen billion, four hundred ninety million, eight hundred fifteen thousand, six hundred eighty-one".