6494885644 has 60 divisors (see below), whose sum is σ = 12432093800. Its totient is φ = 2968797312.

The previous prime is 6494885633. The next prime is 6494885647. The reversal of 6494885644 is 4465884946.

It is not an unprimeable number, because it can be changed into a prime (6494885647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15879712 + ... + 15880120.

Almost surely, 2^6494885644 is an apocalyptic number.

It is an amenable number.

6494885644 is a deficient number, since it is larger than the sum of its proper divisors (5937208156).

6494885644 is a wasteful number, since it uses less digits than its factorization.

6494885644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 563 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 58.

The square root of 6494885644 is about 80590.8533519779. The cubic root of 6494885644 is about 1865.7659784167.

The spelling of 6494885644 in words is "six billion, four hundred ninety-four million, eight hundred eighty-five thousand, six hundred forty-four".