646876135663 has 8 divisors (see below), whose sum is σ = 649612816160. Its totient is φ = 644139889920.

The previous prime is 646876135651. The next prime is 646876135669. The reversal of 646876135663 is 366531678646.

646876135663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646876135663 - 2¹⁷ = 646876004591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646876135669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3069331 + ... + 3273307.

It is an arithmetic number, because the mean of its divisors is an integer number (81201602020).

Almost surely, 2^646876135663 is an apocalyptic number.

646876135663 is a deficient number, since it is larger than the sum of its proper divisors (2736680497).

646876135663 is a wasteful number, since it uses less digits than its factorization.

646876135663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217377.

The product of its digits is 78382080, while the sum is 61.

The spelling of 646876135663 in words is "six hundred forty-six billion, eight hundred seventy-six million, one hundred thirty-five thousand, six hundred sixty-three".