18544080768 has 64 divisors (see below), whose sum is σ = 49645701120. Its totient is φ = 6132672000.

The previous prime is 18544080761. The next prime is 18544080781. The reversal of 18544080768 is 86708044581.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 18544080768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18544080761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141358 + ... + 238893.

It is an arithmetic number, because the mean of its divisors is an integer number (775714080).

Almost surely, 2^18544080768 is an apocalyptic number.

It is an amenable number.

18544080768 is an abundant number, since it is smaller than the sum of its proper divisors (31101620352).

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

18544080768 is a wasteful number, since it uses less digits than its factorization.

18544080768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380395 (or 380383 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 51.

The spelling of 18544080768 in words is "eighteen billion, five hundred forty-four million, eighty thousand, seven hundred sixty-eight".