6440656468883 has 24 divisors (see below), whose sum is σ = 7971219659808. Its totient is φ = 5095454487552.

The previous prime is 6440656468871. The next prime is 6440656468889. The reversal of 6440656468883 is 3888646560446.

It is not a de Polignac number, because 6440656468883 - 2¹⁶ = 6440656403347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6440656468889) 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, 13508585 + ... + 13977237.

It is an arithmetic number, because the mean of its divisors is an integer number (332134152492).

Almost surely, 2^{6440656468883} is an apocalyptic number.

6440656468883 is a deficient number, since it is larger than the sum of its proper divisors (1530563190925).

6440656468883 is a wasteful number, since it uses less digits than its factorization.

6440656468883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480303 (or 480290 counting only the distinct ones).

The product of its (nonzero) digits is 637009920, while the sum is 68.

The spelling of 6440656468883 in words is "six trillion, four hundred forty billion, six hundred fifty-six million, four hundred sixty-eight thousand, eight hundred eighty-three".