1646042159 has 2 divisors, whose sum is σ = 1646042160. Its totient is φ = 1646042158.

The previous prime is 1646042141. The next prime is 1646042161. The reversal of 1646042159 is 9512406461.

It is a strong prime.

It is an emirp because it is prime and its reverse (9512406461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1646042159 - 2²⁰ = 1644993583 is a prime.

Together with 1646042161, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646032159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823021079 + 823021080.

It is an arithmetic number, because the mean of its divisors is an integer number (823021080).

Almost surely, 2^1646042159 is an apocalyptic number.

1646042159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646042159 is an equidigital number, since it uses as much as digits as its factorization.

1646042159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1646042159 is about 40571.4451184574. The cubic root of 1646042159 is about 1180.7201768144.

The spelling of 1646042159 in words is "one billion, six hundred forty-six million, forty-two thousand, one hundred fifty-nine".