111721954616 has 16 divisors (see below), whose sum is σ = 211638240240. Its totient is φ = 55285090560.

The previous prime is 111721954607. The next prime is 111721954703. The reversal of 111721954616 is 616459127111.

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 3 ways as a sum of consecutive naturals, for example, 71985020 + ... + 71986571.

It is an arithmetic number, because the mean of its divisors is an integer number (13227390015).

Almost surely, 2^111721954616 is an apocalyptic number.

It is an amenable number.

111721954616 is a deficient number, since it is larger than the sum of its proper divisors (99916285624).

111721954616 is a wasteful number, since it uses less digits than its factorization.

111721954616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143971694 (or 143971690 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The spelling of 111721954616 in words is "one hundred eleven billion, seven hundred twenty-one million, nine hundred fifty-four thousand, six hundred sixteen".