6478264489 has 4 divisors (see below), whose sum is σ = 6483452500. Its totient is φ = 6473076480.

The previous prime is 6478264469. The next prime is 6478264517. The reversal of 6478264489 is 9844628746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1101708864 + 5376555625 = 33192^2 + 73325^2 .

It is a cyclic number.

It is not a de Polignac number, because 6478264489 - 2⁷ = 6478264361 is a prime.

It is a super-2 number, since 2×6478264489² = 83935821578876862242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6478264469) 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 3 ways as a sum of consecutive naturals, for example, 2592132 + ... + 2594629.

It is an arithmetic number, because the mean of its divisors is an integer number (1620863125).

Almost surely, 2^6478264489 is an apocalyptic number.

It is an amenable number.

6478264489 is a deficient number, since it is larger than the sum of its proper divisors (5188011).

6478264489 is a wasteful number, since it uses less digits than its factorization.

6478264489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5188010.

The product of its digits is 18579456, while the sum is 58.

The square root of 6478264489 is about 80487.6666887542. Note that the first 4 decimals coincide. The cubic root of 6478264489 is about 1864.1730493225.

The spelling of 6478264489 in words is "six billion, four hundred seventy-eight million, two hundred sixty-four thousand, four hundred eighty-nine".