1690431821159 has 2 divisors, whose sum is σ = 1690431821160. Its totient is φ = 1690431821158.

The previous prime is 1690431821059. The next prime is 1690431821213. The reversal of 1690431821159 is 9511281340961.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1690431821159 - 2²⁴ = 1690415043943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690431821059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845215910579 + 845215910580.

It is an arithmetic number, because the mean of its divisors is an integer number (845215910580).

Almost surely, 2^{1690431821159} is an apocalyptic number.

1690431821159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690431821159 is an equidigital number, since it uses as much as digits as its factorization.

1690431821159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 1690431821159 in words is "one trillion, six hundred ninety billion, four hundred thirty-one million, eight hundred twenty-one thousand, one hundred fifty-nine".