1684631645597 has 2 divisors, whose sum is σ = 1684631645598. Its totient is φ = 1684631645596.

The previous prime is 1684631645551. The next prime is 1684631645617. The reversal of 1684631645597 is 7955461364861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1401124383481 + 283507262116 = 1183691^2 + 532454^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684631645597 - 2¹² = 1684631641501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684631645897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842315822798 + 842315822799.

It is an arithmetic number, because the mean of its divisors is an integer number (842315822799).

Almost surely, 2^{1684631645597} is an apocalyptic number.

It is an amenable number.

1684631645597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684631645597 is an equidigital number, since it uses as much as digits as its factorization.

1684631645597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 130636800, while the sum is 65.

The spelling of 1684631645597 in words is "one trillion, six hundred eighty-four billion, six hundred thirty-one million, six hundred forty-five thousand, five hundred ninety-seven".