421073576520 has 128 divisors (see below), whose sum is σ = 1286991590400. Its totient is φ = 110180318976.

The previous prime is 421073576503. The next prime is 421073576527. The reversal of 421073576520 is 25675370124.

It is not an unprimeable number, because it can be changed into a prime (421073576527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3818397 + ... + 3927123.

It is an arithmetic number, because the mean of its divisors is an integer number (10054621800).

Almost surely, 2^421073576520 is an apocalyptic number.

421073576520 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 421073576520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (643495795200).

421073576520 is an abundant number, since it is smaller than the sum of its proper divisors (865918013880).

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

421073576520 is a wasteful number, since it uses less digits than its factorization.

421073576520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109347 (or 109343 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 421073576520 in words is "four hundred twenty-one billion, seventy-three million, five hundred seventy-six thousand, five hundred twenty".