4021664643024 has 80 divisors (see below), whose sum is σ = 11888127444480. Its totient is φ = 1147630135680.

The previous prime is 4021664643001. The next prime is 4021664643043. The reversal of 4021664643024 is 4203464661204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7106814 + ... + 7651805.

It is an arithmetic number, because the mean of its divisors is an integer number (148601593056).

Almost surely, 2^{4021664643024} is an apocalyptic number.

It is an amenable number.

4021664643024 is an abundant number, since it is smaller than the sum of its proper divisors (7866462801456).

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

4021664643024 is a wasteful number, since it uses less digits than its factorization.

4021664643024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14759448 (or 14759442 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 4021664643024 in words is "four trillion, twenty-one billion, six hundred sixty-four million, six hundred forty-three thousand, twenty-four".