6465442466021 has 24 divisors (see below), whose sum is σ = 8204910837120. Its totient is φ = 5037911088000.

The previous prime is 6465442466011. The next prime is 6465442466029. The reversal of 6465442466021 is 1206642445646.

It is a de Polignac number, because none of the positive numbers 2^k-6465442466021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465442466029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43882445 + ... + 44029533.

It is an arithmetic number, because the mean of its divisors is an integer number (341871284880).

Almost surely, 2^{6465442466021} is an apocalyptic number.

It is an amenable number.

6465442466021 is a deficient number, since it is larger than the sum of its proper divisors (1739468371099).

6465442466021 is a wasteful number, since it uses less digits than its factorization.

6465442466021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228665 (or 228658 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 50.

The spelling of 6465442466021 in words is "six trillion, four hundred sixty-five billion, four hundred forty-two million, four hundred sixty-six thousand, twenty-one".