426231640321 has 4 divisors (see below), whose sum is σ = 428586511444. Its totient is φ = 423876769200.

The previous prime is 426231640309. The next prime is 426231640337. The reversal of 426231640321 is 123046132624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129600000000 + 296631640321 = 360000^2 + 544639^2 .

It is a cyclic number.

It is not a de Polignac number, because 426231640321 - 2⁷ = 426231640193 is a prime.

It is a super-2 number, since 2×426231640321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426231640391) 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 3 ways as a sum of consecutive naturals, for example, 1177435290 + ... + 1177435651.

It is an arithmetic number, because the mean of its divisors is an integer number (107146627861).

Almost surely, 2^426231640321 is an apocalyptic number.

It is an amenable number.

426231640321 is a deficient number, since it is larger than the sum of its proper divisors (2354871123).

426231640321 is a wasteful number, since it uses less digits than its factorization.

426231640321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354871122.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 426231640321 its reverse (123046132624), we get a palindrome (549277772945).

The spelling of 426231640321 in words is "four hundred twenty-six billion, two hundred thirty-one million, six hundred forty thousand, three hundred twenty-one".