18069517568 has 72 divisors (see below), whose sum is σ = 36521112768. Its totient is φ = 8922120192.

The previous prime is 18069517561. The next prime is 18069517589. The reversal of 18069517568 is 86571596081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18069517561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6967280 + ... + 6969872.

Almost surely, 2^18069517568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18069517568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18260556384).

18069517568 is an abundant number, since it is smaller than the sum of its proper divisors (18451595200).

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

18069517568 is a wasteful number, since it uses less digits than its factorization.

18069517568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939 (or 2925 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 18069517568 in words is "eighteen billion, sixty-nine million, five hundred seventeen thousand, five hundred sixty-eight".