646027080659 has 4 divisors (see below), whose sum is σ = 651953934720. Its totient is φ = 640100226600.

The previous prime is 646027080641. The next prime is 646027080667. The reversal of 646027080659 is 956080720646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956080720646 = 2 ⋅478040360323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646027080659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646027080659.

It is not an unprimeable number, because it can be changed into a prime (646027080059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2963426867 + ... + 2963427084.

It is an arithmetic number, because the mean of its divisors is an integer number (162988483680).

Almost surely, 2^646027080659 is an apocalyptic number.

646027080659 is a deficient number, since it is larger than the sum of its proper divisors (5926854061).

646027080659 is a wasteful number, since it uses less digits than its factorization.

646027080659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926854060.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 646027080659 in words is "six hundred forty-six billion, twenty-seven million, eighty thousand, six hundred fifty-nine".