6440804144553 has 32 divisors (see below), whose sum is σ = 8872430048640. Its totient is φ = 4153831718400.

The previous prime is 6440804144543. The next prime is 6440804144563. The reversal of 6440804144553 is 3554414080446.

It is an interprime number because it is at equal distance from previous prime (6440804144543) and next prime (6440804144563).

It is not a de Polignac number, because 6440804144553 - 2⁸ = 6440804144297 is a prime.

It is a super-2 number, since 2×6440804144553² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6440804144513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37393078 + ... + 37564928.

It is an arithmetic number, because the mean of its divisors is an integer number (277263439020).

Almost surely, 2^{6440804144553} is an apocalyptic number.

It is an amenable number.

6440804144553 is a deficient number, since it is larger than the sum of its proper divisors (2431625904087).

6440804144553 is a wasteful number, since it uses less digits than its factorization.

6440804144553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175209.

The product of its (nonzero) digits is 3686400, while the sum is 48.

The spelling of 6440804144553 in words is "six trillion, four hundred forty billion, eight hundred four million, one hundred forty-four thousand, five hundred fifty-three".