421328857170 has 128 divisors (see below), whose sum is σ = 1119062697984. Its totient is φ = 100849342464.

The previous prime is 421328857139. The next prime is 421328857193. The reversal of 421328857170 is 71758823124.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27596959 + ... + 27612221.

It is an arithmetic number, because the mean of its divisors is an integer number (8742677328).

Almost surely, 2^421328857170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421328857170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559531348992).

421328857170 is an abundant number, since it is smaller than the sum of its proper divisors (697733840814).

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

421328857170 is a wasteful number, since it uses less digits than its factorization.

421328857170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17236.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 421328857170 in words is "four hundred twenty-one billion, three hundred twenty-eight million, eight hundred fifty-seven thousand, one hundred seventy".