9180000000 has 576 divisors, whose sum is σ = 35929595520. Its totient is φ = 2304000000.

The previous prime is 9179999981. The next prime is 9180000001. The reversal of 9180000000 is 819.

It is a tau number, because it is divible by the number of its divisors (576).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9180000001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 539999992 + ... + 540000008.

It is an arithmetic number, because the mean of its divisors is an integer number (62377770).

Almost surely, 2^9180000000 is an apocalyptic number.

9180000000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9180000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17964797760).

9180000000 is an abundant number, since it is smaller than the sum of its proper divisors (26749595520).

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

9180000000 is an frugal number, since it uses more digits than its factorization.

9180000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 9180000000 is about 95812.3165360279. The cubic root of 9180000000 is about 2093.8596140727.

Adding to 9180000000 its reverse (819), we get a palindrome (9180000819).

The spelling of 9180000000 in words is "nine billion, one hundred eighty million", and thus it is an aban number.