6478467409 has 4 divisors (see below), whose sum is σ = 6478628404. Its totient is φ = 6478306416.

The previous prime is 6478467397. The next prime is 6478467433. The reversal of 6478467409 is 9047648746.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3959933184 + 2518534225 = 62928^2 + 50185^2 .

It is a cyclic number.

It is not a de Polignac number, because 6478467409 - 2²⁹ = 5941596497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6478467409.

It is not an unprimeable number, because it can be changed into a prime (6478467439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38539 + ... + 120175.

It is an arithmetic number, because the mean of its divisors is an integer number (1619657101).

Almost surely, 2^6478467409 is an apocalyptic number.

It is an amenable number.

6478467409 is a deficient number, since it is larger than the sum of its proper divisors (160995).

6478467409 is an equidigital number, since it uses as much as digits as its factorization.

6478467409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160994.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The square root of 6478467409 is about 80488.9272446838. The cubic root of 6478467409 is about 1864.1925130768.

The spelling of 6478467409 in words is "six billion, four hundred seventy-eight million, four hundred sixty-seven thousand, four hundred nine".