349785670491799 has 2 divisors, whose sum is σ = 349785670491800. Its totient is φ = 349785670491798.

The previous prime is 349785670491787. The next prime is 349785670491853. The reversal of 349785670491799 is 997194076587943.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 349785670491799 - 2¹³ = 349785670483607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349785670491199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174892835245899 + 174892835245900.

It is an arithmetic number, because the mean of its divisors is an integer number (174892835245900).

Almost surely, 2^{349785670491799} is an apocalyptic number.

349785670491799 is a deficient number, since it is larger than the sum of its proper divisors (1).

349785670491799 is an equidigital number, since it uses as much as digits as its factorization.

349785670491799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25924872960, while the sum is 88.

The spelling of 349785670491799 in words is "three hundred forty-nine trillion, seven hundred eighty-five billion, six hundred seventy million, four hundred ninety-one thousand, seven hundred ninety-nine".