981109550 has 12 divisors (see below), whose sum is σ = 1824863856. Its totient is φ = 392443800.

The previous prime is 981109513. The next prime is 981109573. The reversal of 981109550 is 55901189.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 9811046 + ... + 9811145.

It is an arithmetic number, because the mean of its divisors is an integer number (152071988).

Almost surely, 2^981109550 is an apocalyptic number.

981109550 is a deficient number, since it is larger than the sum of its proper divisors (843754306).

981109550 is a wasteful number, since it uses less digits than its factorization.

981109550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19622203 (or 19622198 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 981109550 is about 31322.6683090697. The cubic root of 981109550 is about 993.6631120056.

The spelling of 981109550 in words is "nine hundred eighty-one million, one hundred nine thousand, five hundred fifty".