421935507987168 has 144 divisors (see below), whose sum is σ = 1288458351959184. Its totient is φ = 120548497950720.

The previous prime is 421935507987157. The next prime is 421935507987211. The reversal of 421935507987168 is 861789705539124.

It is a super-2 number, since 2×421935507987168² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421935507987168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125256396 + ... + 128580852.

It is an arithmetic number, because the mean of its divisors is an integer number (8947627444161).

It is a 1-persistent number, because it is pandigital, but 2⋅421935507987168 = 843871015974336 is not.

Almost surely, 2^{421935507987168} is an apocalyptic number.

421935507987168 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

421935507987168 is an abundant number, since it is smaller than the sum of its proper divisors (866522843972016).

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

421935507987168 is a wasteful number, since it uses less digits than its factorization.

421935507987168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351465 (or 3351450 counting only the distinct ones).

The product of its (nonzero) digits is 914457600, while the sum is 75.

The spelling of 421935507987168 in words is "four hundred twenty-one trillion, nine hundred thirty-five billion, five hundred seven million, nine hundred eighty-seven thousand, one hundred sixty-eight".