6406784417 has 4 divisors (see below), whose sum is σ = 6989219376. Its totient is φ = 5824349460.

The previous prime is 6406784393. The next prime is 6406784431. The reversal of 6406784417 is 7144876046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6406784417 - 2¹⁸ = 6406522273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406784017) 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, 291217463 + ... + 291217484.

It is an arithmetic number, because the mean of its divisors is an integer number (1747304844).

Almost surely, 2^6406784417 is an apocalyptic number.

It is an amenable number.

6406784417 is a deficient number, since it is larger than the sum of its proper divisors (582434959).

6406784417 is a wasteful number, since it uses less digits than its factorization.

6406784417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582434958.

The product of its (nonzero) digits is 903168, while the sum is 47.

The square root of 6406784417 is about 80042.3913748209. The cubic root of 6406784417 is about 1857.2913533080.

The spelling of 6406784417 in words is "six billion, four hundred six million, seven hundred eighty-four thousand, four hundred seventeen".