421229818368 has 150 divisors (see below), whose sum is σ = 1257654713931. Its totient is φ = 140365882368.

The previous prime is 421229818349. The next prime is 421229818381. The reversal of 421229818368 is 863818922124.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

421229818368 is a `hidden beast` number, since 4 + 212 + 298 + 1 + 83 + 68 = 666.

It can be written as a sum of positive squares in only one way, i.e., 210614909184 + 210614909184 = 458928^2 + 458928^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=458928.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 132169671 + ... + 132172857.

Almost surely, 2^421229818368 is an apocalyptic number.

421229818368 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421229818368

421229818368 is an abundant number, since it is smaller than the sum of its proper divisors (836424895563).

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

421229818368 is an frugal number, since it uses more digits than its factorization.

421229818368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404 (or 3192 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 421229818368 in words is "four hundred twenty-one billion, two hundred twenty-nine million, eight hundred eighteen thousand, three hundred sixty-eight".