9997716252691 has 2 divisors, whose sum is σ = 9997716252692. Its totient is φ = 9997716252690.

The previous prime is 9997716252679. The next prime is 9997716252703. The reversal of 9997716252691 is 1962526177999.

It is a balanced prime because it is at equal distance from previous prime (9997716252679) and next prime (9997716252703).

It is a cyclic number.

It is not a de Polignac number, because 9997716252691 - 2⁹ = 9997716252179 is a prime.

It is not a weakly prime, because it can be changed into another prime (9997716252611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998858126345 + 4998858126346.

It is an arithmetic number, because the mean of its divisors is an integer number (4998858126346).

Almost surely, 2^{9997716252691} is an apocalyptic number.

9997716252691 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997716252691 is an equidigital number, since it uses as much as digits as its factorization.

9997716252691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 231472080, while the sum is 73.

The spelling of 9997716252691 in words is "nine trillion, nine hundred ninety-seven billion, seven hundred sixteen million, two hundred fifty-two thousand, six hundred ninety-one".