18006446772496 has 80 divisors (see below), whose sum is σ = 42988439536000. Its totient is φ = 7115136297984.

The previous prime is 18006446772463. The next prime is 18006446772533. The reversal of 18006446772496 is 69427764460081.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5947821 + ... + 8449228.

It is an arithmetic number, because the mean of its divisors is an integer number (537355494200).

Almost surely, 2^{18006446772496} is an apocalyptic number.

18006446772496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18006446772496 is an abundant number, since it is smaller than the sum of its proper divisors (24981992763504).

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

18006446772496 is a wasteful number, since it uses less digits than its factorization.

18006446772496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14397936 (or 14397930 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 64.

The spelling of 18006446772496 in words is "eighteen trillion, six billion, four hundred forty-six million, seven hundred seventy-two thousand, four hundred ninety-six".