6446322145 has 8 divisors (see below), whose sum is σ = 7756327656. Its totient is φ = 5143230336.

The previous prime is 6446322139. The next prime is 6446322161. The reversal of 6446322145 is 5412236446.

It can be written as a sum of positive squares in 4 ways, for example, as 2351474064 + 4094848081 = 48492^2 + 63991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6446322145 - 2³ = 6446322137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1726372 + ... + 1730101.

It is an arithmetic number, because the mean of its divisors is an integer number (969540957).

Almost surely, 2^6446322145 is an apocalyptic number.

It is an amenable number.

6446322145 is a deficient number, since it is larger than the sum of its proper divisors (1310005511).

6446322145 is a wasteful number, since it uses less digits than its factorization.

6446322145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456851.

The product of its digits is 138240, while the sum is 37.

The square root of 6446322145 is about 80288.9914309552. The cubic root of 6446322145 is about 1861.1041104270.

The spelling of 6446322145 in words is "six billion, four hundred forty-six million, three hundred twenty-two thousand, one hundred forty-five".