6445115432 has 64 divisors (see below), whose sum is σ = 14111280000. Its totient is φ = 2758576128.

The previous prime is 6445115393. The next prime is 6445115441. The reversal of 6445115432 is 2345115446.

It is a junction number, because it is equal to n+sod(n) for n = 6445115392 and 6445115401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3865463 + ... + 3867129.

It is an arithmetic number, because the mean of its divisors is an integer number (220488750).

Almost surely, 2^6445115432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6445115432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7055640000).

6445115432 is an abundant number, since it is smaller than the sum of its proper divisors (7666164568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6445115432 is a wasteful number, since it uses less digits than its factorization.

6445115432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103 (or 3085 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 6445115432 is about 80281.4762694359. The cubic root of 6445115432 is about 1860.9879739892.

The spelling of 6445115432 in words is "six billion, four hundred forty-five million, one hundred fifteen thousand, four hundred thirty-two".