6445989741832 has 16 divisors (see below), whose sum is σ = 12112677667260. Its totient is φ = 3215942363904.

The previous prime is 6445989741809. The next prime is 6445989741859. The reversal of 6445989741832 is 2381479895446.

It can be written as a sum of positive squares in 2 ways, for example, as 4439727128356 + 2006262613476 = 2107066^2 + 1416426^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881559493 + ... + 881566804.

Almost surely, 2^{6445989741832} is an apocalyptic number.

It is an amenable number.

6445989741832 is a deficient number, since it is larger than the sum of its proper divisors (5666687925428).

6445989741832 is a wasteful number, since it uses less digits than its factorization.

6445989741832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763126760 (or 1763126756 counting only the distinct ones).

The product of its digits is 418037760, while the sum is 70.

The spelling of 6445989741832 in words is "six trillion, four hundred forty-five billion, nine hundred eighty-nine million, seven hundred forty-one thousand, eight hundred thirty-two".