421313953440 has 144 divisors (see below), whose sum is σ = 1374481731168. Its totient is φ = 108476132352.

The previous prime is 421313953433. The next prime is 421313953451. The reversal of 421313953440 is 44359313124.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118162 + ... + 925521.

It is an arithmetic number, because the mean of its divisors is an integer number (9545012022).

Almost surely, 2^421313953440 is an apocalyptic number.

421313953440 is a gapful number since it is divisible by the number (40) 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 421313953440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687240865584).

421313953440 is an abundant number, since it is smaller than the sum of its proper divisors (953167777728).

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

421313953440 is a wasteful number, since it uses less digits than its factorization.

421313953440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043759 (or 1043722 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 421313953440 in words is "four hundred twenty-one billion, three hundred thirteen million, nine hundred fifty-three thousand, four hundred forty".