981948849188 has 24 divisors (see below), whose sum is σ = 1722785886360. Its totient is φ = 489724554240.

The previous prime is 981948849179. The next prime is 981948849317. The reversal of 981948849188 is 881948849189.

It can be written as a sum of positive squares in 4 ways, for example, as 558379573504 + 423569275684 = 747248^2 + 650822^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20381768 + ... + 20429888.

It is an arithmetic number, because the mean of its divisors is an integer number (71782745265).

Almost surely, 2^981948849188 is an apocalyptic number.

It is an amenable number.

981948849188 is a deficient number, since it is larger than the sum of its proper divisors (740837037172).

981948849188 is a wasteful number, since it uses less digits than its factorization.

981948849188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61007 (or 61005 counting only the distinct ones).

The product of its digits is 382205952, while the sum is 77.

Subtracting from 981948849188 its reverse (881948849189), we obtain a palindrome (99999999999).

The spelling of 981948849188 in words is "nine hundred eighty-one billion, nine hundred forty-eight million, eight hundred forty-nine thousand, one hundred eighty-eight".