981919227988 has 12 divisors (see below), whose sum is σ = 1720135655392. Its totient is φ = 490451897880.

The previous prime is 981919227937. The next prime is 981919228001. The reversal of 981919227988 is 889722919189.

It is a self number, because there is not a number n which added to its sum of digits gives 981919227988.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126924678 + ... + 126932413.

Almost surely, 2^981919227988 is an apocalyptic number.

It is an amenable number.

981919227988 is a deficient number, since it is larger than the sum of its proper divisors (738216427404).

981919227988 is a wasteful number, since it uses less digits than its factorization.

981919227988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253858062 (or 253858060 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 73.

The spelling of 981919227988 in words is "nine hundred eighty-one billion, nine hundred nineteen million, two hundred twenty-seven thousand, nine hundred eighty-eight".