6494430905 has 4 divisors (see below), whose sum is σ = 7793317092. Its totient is φ = 5195544720.

The previous prime is 6494430851. The next prime is 6494430919. The reversal of 6494430905 is 5090344946.

It is a happy number.

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 1475558569 + 5018872336 = 38413^2 + 70844^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6494430905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649443086 + ... + 649443095.

It is an arithmetic number, because the mean of its divisors is an integer number (1948329273).

Almost surely, 2^6494430905 is an apocalyptic number.

It is an amenable number.

6494430905 is a deficient number, since it is larger than the sum of its proper divisors (1298886187).

6494430905 is a wasteful number, since it uses less digits than its factorization.

6494430905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298886186.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 6494430905 is about 80588.0320208900. The cubic root of 6494430905 is about 1865.7224335722.

The spelling of 6494430905 in words is "six billion, four hundred ninety-four million, four hundred thirty thousand, nine hundred five".