1680750197249 has 2 divisors, whose sum is σ = 1680750197250. Its totient is φ = 1680750197248.

The previous prime is 1680750197221. The next prime is 1680750197267. The reversal of 1680750197249 is 9427910570861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206607780849 + 474142416400 = 1098457^2 + 688580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1680750197249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680750197279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840375098624 + 840375098625.

It is an arithmetic number, because the mean of its divisors is an integer number (840375098625).

Almost surely, 2^{1680750197249} is an apocalyptic number.

It is an amenable number.

1680750197249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680750197249 is an equidigital number, since it uses as much as digits as its factorization.

1680750197249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 59.

The spelling of 1680750197249 in words is "one trillion, six hundred eighty billion, seven hundred fifty million, one hundred ninety-seven thousand, two hundred forty-nine".