646319913646 has 32 divisors (see below), whose sum is σ = 1094205062880. Its totient is φ = 283619952000.

The previous prime is 646319913643. The next prime is 646319913703.

646319913646 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646319913643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6265680 + ... + 6367996.

It is an arithmetic number, because the mean of its divisors is an integer number (34193908215).

Almost surely, 2^646319913646 is an apocalyptic number.

646319913646 is a deficient number, since it is larger than the sum of its proper divisors (447885149234).

646319913646 is a wasteful number, since it uses less digits than its factorization.

646319913646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112260.

The product of its digits is 15116544, while the sum is 58.

The spelling of 646319913646 in words is "six hundred forty-six billion, three hundred nineteen million, nine hundred thirteen thousand, six hundred forty-six".