423405996552 has 256 divisors, whose sum is σ = 1478466662400. Its totient is φ = 109975060800.

The previous prime is 423405996551. The next prime is 423405996599. The reversal of 423405996552 is 255699504324.

423405996552 is a `hidden beast` number, since 4 + 2 + 3 + 40 + 599 + 6 + 5 + 5 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (423405996551) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 1907277 + ... + 2117667.

It is an arithmetic number, because the mean of its divisors is an integer number (5775260400).

Almost surely, 2^423405996552 is an apocalyptic number.

423405996552 is a gapful number since it is divisible by the number (42) 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 423405996552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739233331200).

423405996552 is an abundant number, since it is smaller than the sum of its proper divisors (1055060665848).

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

423405996552 is a wasteful number, since it uses less digits than its factorization.

423405996552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210446 (or 210414 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 54.

The spelling of 423405996552 in words is "four hundred twenty-three billion, four hundred five million, nine hundred ninety-six thousand, five hundred fifty-two".