423923616901620 has 768 divisors, whose sum is σ = 1483213648896000. Its totient is φ = 100891590059520.

The previous prime is 423923616901531. The next prime is 423923616901649. The reversal of 423923616901620 is 26109616329324.

423923616901620 is a `hidden beast` number, since 4 + 2 + 3 + 9 + 2 + 3 + 6 + 1 + 6 + 9 + 0 + 1 + 620 = 666.

It is a super-2 number, since 2×423923616901620² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 21943342321 + ... + 21943361639.

It is an arithmetic number, because the mean of its divisors is an integer number (1931267772000).

Almost surely, 2^{423923616901620} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423923616901620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741606824448000).

423923616901620 is an abundant number, since it is smaller than the sum of its proper divisors (1059290031994380).

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

423923616901620 is a wasteful number, since it uses less digits than its factorization.

423923616901620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20192 (or 20172 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 423923616901620 in words is "four hundred twenty-three trillion, nine hundred twenty-three billion, six hundred sixteen million, nine hundred one thousand, six hundred twenty".