6444636364446 has 16 divisors (see below), whose sum is σ = 14730597404544. Its totient is φ = 1841324675544.

The previous prime is 6444636364433. The next prime is 6444636364459.

6444636364446 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (6444636364433) and next prime (6444636364459).

It is a super-2 number, since 2×6444636364446² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6444636364446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76721861440 + ... + 76721861523.

It is an arithmetic number, because the mean of its divisors is an integer number (920662337784).

Almost surely, 2^{6444636364446} is an apocalyptic number.

6444636364446 is an abundant number, since it is smaller than the sum of its proper divisors (8285961040098).

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

6444636364446 is a wasteful number, since it uses less digits than its factorization.

6444636364446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153443722975.

The product of its digits is 286654464, while the sum is 60.

The spelling of 6444636364446 in words is "six trillion, four hundred forty-four billion, six hundred thirty-six million, three hundred sixty-four thousand, four hundred forty-six".