2180149988 has 6 divisors (see below), whose sum is σ = 3815262486. Its totient is φ = 1090074992.

The previous prime is 2180149973. The next prime is 2180149999. The reversal of 2180149988 is 8899410812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1213686244 + 966463744 = 34838^2 + 31088^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272518745 + ... + 272518752.

It is an arithmetic number, because the mean of its divisors is an integer number (635877081).

Almost surely, 2^2180149988 is an apocalyptic number.

It is an amenable number.

2180149988 is a deficient number, since it is larger than the sum of its proper divisors (1635112498).

2180149988 is a wasteful number, since it uses less digits than its factorization.

2180149988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545037501 (or 545037499 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 50.

The square root of 2180149988 is about 46692.0762870961. The cubic root of 2180149988 is about 1296.6679933226.

The spelling of 2180149988 in words is "two billion, one hundred eighty million, one hundred forty-nine thousand, nine hundred eighty-eight".