423998664996816 has 120 divisors (see below), whose sum is σ = 1460439846145280. Its totient is φ = 111823823731968.

The previous prime is 423998664996811. The next prime is 423998664996923. The reversal of 423998664996816 is 618699466899324.

423998664996816 is a `hidden beast` number, since 4 + 2 + 39 + 9 + 8 + 6 + 6 + 499 + 6 + 81 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423998664996811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16178202136 + ... + 16178228343.

Almost surely, 2^{423998664996816} is an apocalyptic number.

It is an amenable number.

423998664996816 is an abundant number, since it is smaller than the sum of its proper divisors (1036441181148464).

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

423998664996816 is a wasteful number, since it uses less digits than its factorization.

423998664996816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32356430513 (or 32356430504 counting only the distinct ones).

The product of its digits is 52242776064, while the sum is 90.

The spelling of 423998664996816 in words is "four hundred twenty-three trillion, nine hundred ninety-eight billion, six hundred sixty-four million, nine hundred ninety-six thousand, eight hundred sixteen".