16581433133532 has 48 divisors (see below), whose sum is σ = 40727045152640. Its totient is φ = 5236149707712.

The previous prime is 16581433133497. The next prime is 16581433133549. The reversal of 16581433133532 is 23533133418561.

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 15 ways as a sum of consecutive naturals, for example, 12946998 + ... + 14169954.

Almost surely, 2^{16581433133532} is an apocalyptic number.

16581433133532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16581433133532 is an abundant number, since it is smaller than the sum of its proper divisors (24145612019108).

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

16581433133532 is a wasteful number, since it uses less digits than its factorization.

16581433133532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282450 (or 1282448 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 48.

The spelling of 16581433133532 in words is "sixteen trillion, five hundred eighty-one billion, four hundred thirty-three million, one hundred thirty-three thousand, five hundred thirty-two".