421506323504 has 40 divisors (see below), whose sum is σ = 933455255040. Its totient is φ = 180622375488.

The previous prime is 421506323473. The next prime is 421506323507. The reversal of 421506323504 is 405323605124.

It is not an unprimeable number, because it can be changed into a prime (421506323507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649307 + ... + 1124549.

It is an arithmetic number, because the mean of its divisors is an integer number (23336381376).

Almost surely, 2^421506323504 is an apocalyptic number.

It is an amenable number.

421506323504 is an abundant number, since it is smaller than the sum of its proper divisors (511948931536).

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

421506323504 is a wasteful number, since it uses less digits than its factorization.

421506323504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483177 (or 483171 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 421506323504 its reverse (405323605124), we get a palindrome (826829928628).

The spelling of 421506323504 in words is "four hundred twenty-one billion, five hundred six million, three hundred twenty-three thousand, five hundred four".