981801226898 has 6 divisors (see below), whose sum is σ = 1472703942279. Its totient is φ = 490899912806.

The previous prime is 981801226897. The next prime is 981801226943. The reversal of 981801226898 is 898622108189.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 490900613449 + 490900613449 = 700643^2 + 700643^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=700643.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 981801226898.

It is not an unprimeable number, because it can be changed into a prime (981801226897) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1050965 + ... + 1751607.

Almost surely, 2^981801226898 is an apocalyptic number.

981801226898 is a deficient number, since it is larger than the sum of its proper divisors (490902715381).

981801226898 is an frugal number, since it uses more digits than its factorization.

981801226898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401288 (or 700645 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 62.

The spelling of 981801226898 in words is "nine hundred eighty-one billion, eight hundred one million, two hundred twenty-six thousand, eight hundred ninety-eight".