423517943520 has 768 divisors, whose sum is σ = 1796401152000. Its totient is φ = 91032201216.

The previous prime is 423517943503. The next prime is 423517943593. The reversal of 423517943520 is 25349715324.

It is a happy number.

423517943520 is a `hidden beast` number, since 4 + 2 + 3 + 51 + 79 + 4 + 3 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 79861189 + ... + 79866491.

It is an arithmetic number, because the mean of its divisors is an integer number (2339064000).

Almost surely, 2^423517943520 is an apocalyptic number.

423517943520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423517943520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898200576000).

423517943520 is an abundant number, since it is smaller than the sum of its proper divisors (1372883208480).

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

423517943520 is a wasteful number, since it uses less digits than its factorization.

423517943520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5492 (or 5478 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 423517943520 in words is "four hundred twenty-three billion, five hundred seventeen million, nine hundred forty-three thousand, five hundred twenty".