18091578647712 has 48 divisors (see below), whose sum is σ = 47526897271392. Its totient is φ = 6025890873600.

The previous prime is 18091578647687. The next prime is 18091578647761. The reversal of 18091578647712 is 21774687519081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 72301678 + ... + 72551469.

It is an arithmetic number, because the mean of its divisors is an integer number (990143693154).

Almost surely, 2^{18091578647712} is an apocalyptic number.

18091578647712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18091578647712 is an abundant number, since it is smaller than the sum of its proper divisors (29435318623680).

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

18091578647712 is a wasteful number, since it uses less digits than its factorization.

18091578647712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144854461 (or 144854453 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 66.

The spelling of 18091578647712 in words is "eighteen trillion, ninety-one billion, five hundred seventy-eight million, six hundred forty-seven thousand, seven hundred twelve".