6642093859 has 2 divisors, whose sum is σ = 6642093860. Its totient is φ = 6642093858.

The previous prime is 6642093797. The next prime is 6642093863. The reversal of 6642093859 is 9583902466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6642093859 - 2⁹ = 6642093347 is a prime.

It is not a weakly prime, because it can be changed into another prime (6642093259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321046929 + 3321046930.

It is an arithmetic number, because the mean of its divisors is an integer number (3321046930).

Almost surely, 2^6642093859 is an apocalyptic number.

6642093859 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642093859 is an equidigital number, since it uses as much as digits as its factorization.

6642093859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The square root of 6642093859 is about 81499.0420741250. The cubic root of 6642093859 is about 1879.7568211000.

The spelling of 6642093859 in words is "six billion, six hundred forty-two million, ninety-three thousand, eight hundred fifty-nine".