427867571891 has 12 divisors (see below), whose sum is σ = 451721994192. Its totient is φ = 405213717744.

The previous prime is 427867571867. The next prime is 427867571939. The reversal of 427867571891 is 198175768724.

It is not a de Polignac number, because 427867571891 - 2¹⁸ = 427867309747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427867541891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 901226 + ... + 1291488.

It is an arithmetic number, because the mean of its divisors is an integer number (37643499516).

Almost surely, 2^427867571891 is an apocalyptic number.

427867571891 is a deficient number, since it is larger than the sum of its proper divisors (23854422301).

427867571891 is a wasteful number, since it uses less digits than its factorization.

427867571891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393338 (or 393319 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 65.

The spelling of 427867571891 in words is "four hundred twenty-seven billion, eight hundred sixty-seven million, five hundred seventy-one thousand, eight hundred ninety-one".