426221132642 has 6 divisors (see below), whose sum is σ = 639333083883. Its totient is φ = 213110104682.

The previous prime is 426221132641. The next prime is 426221132657. The reversal of 426221132642 is 246231122624.

It can be written as a sum of positive squares in only one way, i.e., 213110566321 + 213110566321 = 461639^2 + 461639^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=461639.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426221132641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 692459 + ... + 1154097.

Almost surely, 2^426221132642 is an apocalyptic number.

426221132642 is a deficient number, since it is larger than the sum of its proper divisors (213111951241).

426221132642 is an frugal number, since it uses more digits than its factorization.

426221132642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923280 (or 461641 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The spelling of 426221132642 in words is "four hundred twenty-six billion, two hundred twenty-one million, one hundred thirty-two thousand, six hundred forty-two".