427221781826 has 24 divisors (see below), whose sum is σ = 751328188416. Its totient is φ = 181653350760.

The previous prime is 427221781813. The next prime is 427221781843. The reversal of 427221781826 is 628187122724.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17150570 + ... + 17175461.

It is an arithmetic number, because the mean of its divisors is an integer number (31305341184).

Almost surely, 2^427221781826 is an apocalyptic number.

427221781826 is a deficient number, since it is larger than the sum of its proper divisors (324106406590).

427221781826 is a wasteful number, since it uses less digits than its factorization.

427221781826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34326174 (or 34326167 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 50.

The spelling of 427221781826 in words is "four hundred twenty-seven billion, two hundred twenty-one million, seven hundred eighty-one thousand, eight hundred twenty-six".