180128422898 has 18 divisors (see below), whose sum is σ = 277726743693. Its totient is φ = 87619239720.

The previous prime is 180128422889. The next prime is 180128422907. The reversal of 180128422898 is 898224821081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (180128422889) and next prime (180128422907).

It can be written as a sum of positive squares in 2 ways, for example, as 145326401089 + 34802021809 = 381217^2 + 186553^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=300107.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22203863 + ... + 22211973.

Almost surely, 2^180128422898 is an apocalyptic number.

180128422898 is a deficient number, since it is larger than the sum of its proper divisors (97598320795).

180128422898 is an frugal number, since it uses more digits than its factorization.

180128422898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16298 (or 8150 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 53.

The spelling of 180128422898 in words is "one hundred eighty billion, one hundred twenty-eight million, four hundred twenty-two thousand, eight hundred ninety-eight".