423974864581632 has 1584 divisors, whose sum is σ = 1670033807769600. Its totient is φ = 102278790512640.

The previous prime is 423974864581573. The next prime is 423974864581657. The reversal of 423974864581632 is 236185468479324.

423974864581632 is a `hidden beast` number, since 4 + 2 + 3 + 9 + 7 + 4 + 8 + 6 + 4 + 581 + 6 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3234630657 + ... + 3234761727.

Almost surely, 2^{423974864581632} is an apocalyptic number.

423974864581632 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 423974864581632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835016903884800).

423974864581632 is an abundant number, since it is smaller than the sum of its proper divisors (1246058943187968).

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

423974864581632 is a wasteful number, since it uses less digits than its factorization.

423974864581632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131172 (or 131144 counting only the distinct ones).

The product of its digits is 1672151040, while the sum is 72.

The spelling of 423974864581632 in words is "four hundred twenty-three trillion, nine hundred seventy-four billion, eight hundred sixty-four million, five hundred eighty-one thousand, six hundred thirty-two".