7161713806649 has 2 divisors, whose sum is σ = 7161713806650. Its totient is φ = 7161713806648.

The previous prime is 7161713806561. The next prime is 7161713806729. The reversal of 7161713806649 is 9466083171617.

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., 7157995246249 + 3718560400 = 2675443^2 + 60980^2 .

It is a cyclic number.

It is not a de Polignac number, because 7161713806649 - 2²⁰ = 7161712758073 is a prime.

It is not a weakly prime, because it can be changed into another prime (7161713806249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3580856903324 + 3580856903325.

It is an arithmetic number, because the mean of its divisors is an integer number (3580856903325).

Almost surely, 2^{7161713806649} is an apocalyptic number.

It is an amenable number.

7161713806649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7161713806649 is an equidigital number, since it uses as much as digits as its factorization.

7161713806649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 7161713806649 in words is "seven trillion, one hundred sixty-one billion, seven hundred thirteen million, eight hundred six thousand, six hundred forty-nine".