97216902073649 has 2 divisors, whose sum is σ = 97216902073650. Its totient is φ = 97216902073648.

The previous prime is 97216902073609. The next prime is 97216902073657. The reversal of 97216902073649 is 94637020961279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97211081146624 + 5820927025 = 9859568^2 + 76295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97216902073649 is a prime.

It is a super-2 number, since 2×97216902073649² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97216902073609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48608451036824 + 48608451036825.

It is an arithmetic number, because the mean of its divisors is an integer number (48608451036825).

Almost surely, 2^{97216902073649} is an apocalyptic number.

It is an amenable number.

97216902073649 is a deficient number, since it is larger than the sum of its proper divisors (1).

97216902073649 is an equidigital number, since it uses as much as digits as its factorization.

97216902073649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61725888, while the sum is 65.

The spelling of 97216902073649 in words is "ninety-seven trillion, two hundred sixteen billion, nine hundred two million, seventy-three thousand, six hundred forty-nine".