349785670491853 has 2 divisors, whose sum is σ = 349785670491854. Its totient is φ = 349785670491852.

The previous prime is 349785670491799. The next prime is 349785670491857. The reversal of 349785670491853 is 358194076587943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 298218291924004 + 51567378567849 = 17268998^2 + 7181043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349785670491853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349785670491857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174892835245926 + 174892835245927.

It is an arithmetic number, because the mean of its divisors is an integer number (174892835245927).

Almost surely, 2^{349785670491853} is an apocalyptic number.

It is an amenable number.

349785670491853 is a deficient number, since it is larger than the sum of its proper divisors (1).

349785670491853 is an equidigital number, since it uses as much as digits as its factorization.

349785670491853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5486745600, while the sum is 79.

The spelling of 349785670491853 in words is "three hundred forty-nine trillion, seven hundred eighty-five billion, six hundred seventy million, four hundred ninety-one thousand, eight hundred fifty-three".