420638745171 has 8 divisors (see below), whose sum is σ = 562413922560. Its totient is φ = 279644698952.

The previous prime is 420638745169. The next prime is 420638745179. The reversal of 420638745171 is 171547836024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420638745171 - 2¹ = 420638745169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420638745171.

It is not an unprimeable number, because it can be changed into a prime (420638745179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195281535 + ... + 195283688.

It is an arithmetic number, because the mean of its divisors is an integer number (70301740320).

Almost surely, 2^420638745171 is an apocalyptic number.

420638745171 is a deficient number, since it is larger than the sum of its proper divisors (141775177389).

420638745171 is a wasteful number, since it uses less digits than its factorization.

420638745171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390565585.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 420638745171 in words is "four hundred twenty billion, six hundred thirty-eight million, seven hundred forty-five thousand, one hundred seventy-one".