6445326572 has 6 divisors (see below), whose sum is σ = 11279321508. Its totient is φ = 3222663284.

The previous prime is 6445326541. The next prime is 6445326583. The reversal of 6445326572 is 2756235446.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805665818 + ... + 805665825.

It is an arithmetic number, because the mean of its divisors is an integer number (1879886918).

Almost surely, 2^6445326572 is an apocalyptic number.

It is an amenable number.

6445326572 is a deficient number, since it is larger than the sum of its proper divisors (4833994936).

6445326572 is a wasteful number, since it uses less digits than its factorization.

6445326572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611331647 (or 1611331645 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 44.

The square root of 6445326572 is about 80282.7912569064. The cubic root of 6445326572 is about 1861.0082955652.

The spelling of 6445326572 in words is "six billion, four hundred forty-five million, three hundred twenty-six thousand, five hundred seventy-two".