423984841581 has 48 divisors (see below), whose sum is σ = 686324527488. Its totient is φ = 231701500800.

The previous prime is 423984841547. The next prime is 423984841603. The reversal of 423984841581 is 185148489324.

It is a de Polignac number, because none of the positive numbers 2^k-423984841581 is a prime.

It is a super-2 number, since 2×423984841581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423984841531) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 33063151 + ... + 33075971.

It is an arithmetic number, because the mean of its divisors is an integer number (14298427656).

Almost surely, 2^423984841581 is an apocalyptic number.

It is an amenable number.

423984841581 is a deficient number, since it is larger than the sum of its proper divisors (262339685907).

423984841581 is a wasteful number, since it uses less digits than its factorization.

423984841581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22642 (or 22635 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 57.

The spelling of 423984841581 in words is "four hundred twenty-three billion, nine hundred eighty-four million, eight hundred forty-one thousand, five hundred eighty-one".