646419914646 has 64 divisors (see below), whose sum is σ = 1417291416576. Its totient is φ = 194925060000.

The previous prime is 646419914599. The next prime is 646419914659.

646419914646 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 646419914646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18586245 + ... + 18620991.

It is an arithmetic number, because the mean of its divisors is an integer number (22145178384).

Almost surely, 2^646419914646 is an apocalyptic number.

646419914646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

646419914646 is an abundant number, since it is smaller than the sum of its proper divisors (770871501930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646419914646 is a wasteful number, since it uses less digits than its factorization.

646419914646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36137.

The product of its digits is 26873856, while the sum is 60.

The spelling of 646419914646 in words is "six hundred forty-six billion, four hundred nineteen million, nine hundred fourteen thousand, six hundred forty-six".