6405424420571 has 4 divisors (see below), whose sum is σ = 6987735731544. Its totient is φ = 5823113109600.

The previous prime is 6405424420559. The next prime is 6405424420649. The reversal of 6405424420571 is 1750244245046.

It is a happy number.

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 6405424420571 - 2²⁶ = 6405357311707 is a prime.

It is a super-3 number, since 3×6405424420571³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6405424429571) 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, 291155655470 + ... + 291155655491.

It is an arithmetic number, because the mean of its divisors is an integer number (1746933932886).

Almost surely, 2^{6405424420571} is an apocalyptic number.

6405424420571 is a deficient number, since it is larger than the sum of its proper divisors (582311310973).

6405424420571 is a wasteful number, since it uses less digits than its factorization.

6405424420571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582311310972.

The product of its (nonzero) digits is 1075200, while the sum is 44.

The spelling of 6405424420571 in words is "six trillion, four hundred five billion, four hundred twenty-four million, four hundred twenty thousand, five hundred seventy-one".