6494491844 has 24 divisors (see below), whose sum is σ = 12057617880. Its totient is φ = 3050210816.

The previous prime is 6494491841. The next prime is 6494491849. The reversal of 6494491844 is 4481944946.

It can be written as a sum of positive squares in 4 ways, for example, as 2993402944 + 3501088900 = 54712^2 + 59170^2 .

It is not an unprimeable number, because it can be changed into a prime (6494491841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59207 + ... + 128430.

It is an arithmetic number, because the mean of its divisors is an integer number (502400745).

Almost surely, 2^6494491844 is an apocalyptic number.

It is an amenable number.

6494491844 is a deficient number, since it is larger than the sum of its proper divisors (5563126036).

6494491844 is a wasteful number, since it uses less digits than its factorization.

6494491844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188167 (or 188165 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 53.

The square root of 6494491844 is about 80588.4101096429. The cubic root of 6494491844 is about 1865.7282690799.

The spelling of 6494491844 in words is "six billion, four hundred ninety-four million, four hundred ninety-one thousand, eight hundred forty-four".