646842248646 has 64 divisors (see below), whose sum is σ = 1494572311296. Its totient is φ = 184450176000.

The previous prime is 646842248641. The next prime is 646842248677.

646842248646 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 646842248646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646842248641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6732546 + ... + 6827946.

It is an arithmetic number, because the mean of its divisors is an integer number (23352692364).

Almost surely, 2^646842248646 is an apocalyptic number.

646842248646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

646842248646 is an abundant number, since it is smaller than the sum of its proper divisors (847730062650).

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

646842248646 is a wasteful number, since it uses less digits than its factorization.

646842248646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101477.

The product of its digits is 84934656, while the sum is 60.

The spelling of 646842248646 in words is "six hundred forty-six billion, eight hundred forty-two million, two hundred forty-eight thousand, six hundred forty-six".