6445872181376 has 32 divisors (see below), whose sum is σ = 12841651879680. Its totient is φ = 3222869356800.

The previous prime is 6445872181367. The next prime is 6445872181393. The reversal of 6445872181376 is 6731812785446.

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 6002201 + ... + 6994151.

It is an arithmetic number, because the mean of its divisors is an integer number (401301621240).

Almost surely, 2^{6445872181376} is an apocalyptic number.

It is an amenable number.

6445872181376 is a deficient number, since it is larger than the sum of its proper divisors (6395779698304).

6445872181376 is an equidigital number, since it uses as much as digits as its factorization.

6445872181376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042732 (or 1042720 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 62.

The spelling of 6445872181376 in words is "six trillion, four hundred forty-five billion, eight hundred seventy-two million, one hundred eighty-one thousand, three hundred seventy-six".