19497245881601 has 2 divisors, whose sum is σ = 19497245881602. Its totient is φ = 19497245881600.

The previous prime is 19497245881483. The next prime is 19497245881609. The reversal of 19497245881601 is 10618854279491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10977618936001 + 8519626945600 = 3313249^2 + 2918840^2 .

It is a cyclic number.

It is not a de Polignac number, because 19497245881601 - 2¹⁰ = 19497245880577 is a prime.

It is not a weakly prime, because it can be changed into another prime (19497245881609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9748622940800 + 9748622940801.

It is an arithmetic number, because the mean of its divisors is an integer number (9748622940801).

Almost surely, 2^{19497245881601} is an apocalyptic number.

It is an amenable number.

19497245881601 is a deficient number, since it is larger than the sum of its proper divisors (1).

19497245881601 is an equidigital number, since it uses as much as digits as its factorization.

19497245881601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34836480, while the sum is 65.

The spelling of 19497245881601 in words is "nineteen trillion, four hundred ninety-seven billion, two hundred forty-five million, eight hundred eighty-one thousand, six hundred one".