6493774861 has 8 divisors (see below), whose sum is σ = 7437700160. Its totient is φ = 5553910368.

The previous prime is 6493774843. The next prime is 6493774867. The reversal of 6493774861 is 1684773946.

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 6493774861 - 2¹⁷ = 6493643789 is a prime.

It is a super-2 number, since 2×6493774861² = 84338223890711138642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6493774867) by changing a digit.

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, 1011771 + ... + 1018168.

It is an arithmetic number, because the mean of its divisors is an integer number (929712520).

Almost surely, 2^6493774861 is an apocalyptic number.

It is an amenable number.

6493774861 is a deficient number, since it is larger than the sum of its proper divisors (943925299).

6493774861 is a wasteful number, since it uses less digits than its factorization.

6493774861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030403.

The product of its digits is 6096384, while the sum is 55.

The square root of 6493774861 is about 80583.9615618393. The cubic root of 6493774861 is about 1865.6596086050.

The spelling of 6493774861 in words is "six billion, four hundred ninety-three million, seven hundred seventy-four thousand, eight hundred sixty-one".