421213618432 has 72 divisors (see below), whose sum is σ = 878049910080. Its totient is φ = 201286440960.

The previous prime is 421213618421. The next prime is 421213618433. The reversal of 421213618432 is 234816312124.

It is a junction number, because it is equal to n+sod(n) for n = 421213618391 and 421213618400.

It is not an unprimeable number, because it can be changed into a prime (421213618433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7384582 + ... + 7441402.

It is an arithmetic number, because the mean of its divisors is an integer number (12195137640).

Almost surely, 2^421213618432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421213618432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439024955040).

421213618432 is an abundant number, since it is smaller than the sum of its proper divisors (456836291648).

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

421213618432 is a wasteful number, since it uses less digits than its factorization.

421213618432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58119 (or 58105 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The spelling of 421213618432 in words is "four hundred twenty-one billion, two hundred thirteen million, six hundred eighteen thousand, four hundred thirty-two".