426688422021 has 24 divisors (see below), whose sum is σ = 626402190336. Its totient is φ = 279829546560.

The previous prime is 426688421987. The next prime is 426688422079. The reversal of 426688422021 is 120224886624.

It is not a de Polignac number, because 426688422021 - 2¹⁹ = 426687897733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426688422421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 596215 + ... + 1099476.

It is an arithmetic number, because the mean of its divisors is an integer number (26100091264).

Almost surely, 2^426688422021 is an apocalyptic number.

It is an amenable number.

426688422021 is a deficient number, since it is larger than the sum of its proper divisors (199713768315).

426688422021 is a wasteful number, since it uses less digits than its factorization.

426688422021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696153 (or 1696150 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The spelling of 426688422021 in words is "four hundred twenty-six billion, six hundred eighty-eight million, four hundred twenty-two thousand, twenty-one".