6404408471 has 4 divisors (see below), whose sum is σ = 6407134944. Its totient is φ = 6401682000.

The previous prime is 6404408467. The next prime is 6404408473. The reversal of 6404408471 is 1748044046.

6404408471 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6404408471 - 2² = 6404408467 is a prime.

It is a super-3 number, since 3×6404408471³ (a number of 30 digits) contains 333 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 (6404408473) 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, 1359710 + ... + 1364411.

It is an arithmetic number, because the mean of its divisors is an integer number (1601783736).

Almost surely, 2^6404408471 is an apocalyptic number.

6404408471 is a deficient number, since it is larger than the sum of its proper divisors (2726473).

6404408471 is a wasteful number, since it uses less digits than its factorization.

6404408471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726472.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 6404408471 is about 80027.5482006040. The cubic root of 6404408471 is about 1857.0617337213.

The spelling of 6404408471 in words is "six billion, four hundred four million, four hundred eight thousand, four hundred seventy-one".