421195808016 has 45 divisors (see below), whose sum is σ = 1178785064119. Its totient is φ = 140396006688.

The previous prime is 421195807969. The next prime is 421195808021. The reversal of 421195808016 is 610808591124.

It is a happy number.

The square root of 421195808016 is 648996.

It is a perfect power (a square), and thus also a powerful number.

421195808016 is a `hidden beast` number, since 42 + 1 + 19 + 580 + 8 + 0 + 16 = 666.

It is a super-2 number, since 2×421195808016² (a number of 24 digits) contains 22 as substring.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 7760911 + ... + 7814993.

Almost surely, 2^421195808016 is an apocalyptic number.

421195808016 is the 648996-th square number.

It is an amenable number.

421195808016 is an abundant number, since it is smaller than the sum of its proper divisors (757589256103).

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

421195808016 is an frugal number, since it uses more digits than its factorization.

421195808016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108180 (or 54088 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 421195808016 in words is "four hundred twenty-one billion, one hundred ninety-five million, eight hundred eight thousand, sixteen".