421289687632 has 160 divisors (see below), whose sum is σ = 937065024000. Its totient is φ = 181726003200.

The previous prime is 421289687629. The next prime is 421289687657. The reversal of 421289687632 is 236786982124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73765257 + ... + 73770967.

It is an arithmetic number, because the mean of its divisors is an integer number (5856656400).

Almost surely, 2^421289687632 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 421289687632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468532512000).

421289687632 is an abundant number, since it is smaller than the sum of its proper divisors (515775336368).

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

421289687632 is a wasteful number, since it uses less digits than its factorization.

421289687632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6005 (or 5999 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 58.

The spelling of 421289687632 in words is "four hundred twenty-one billion, two hundred eighty-nine million, six hundred eighty-seven thousand, six hundred thirty-two".