426261981222 has 128 divisors (see below), whose sum is σ = 1181636398080. Its totient is φ = 110656385280.

The previous prime is 426261981217. The next prime is 426261981269. The reversal of 426261981222 is 222189162624.

426261981222 is a `hidden beast` number, since 4 + 2 + 6 + 2 + 619 + 8 + 1 + 2 + 22 = 666.

It is a super-2 number, since 2×426261981222² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 7777258 + ... + 7831874.

It is an arithmetic number, because the mean of its divisors is an integer number (9231534360).

Almost surely, 2^426261981222 is an apocalyptic number.

426261981222 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 426261981222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590818199040).

426261981222 is an abundant number, since it is smaller than the sum of its proper divisors (755374416858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

426261981222 is a wasteful number, since it uses less digits than its factorization.

426261981222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56523 (or 56517 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The spelling of 426261981222 in words is "four hundred twenty-six billion, two hundred sixty-one million, nine hundred eighty-one thousand, two hundred twenty-two".