111552215566 has 16 divisors (see below), whose sum is σ = 185040539568. Its totient is φ = 50010955200.

The previous prime is 111552215563. The next prime is 111552215611. The reversal of 111552215566 is 665512255111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111552215563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34728225 + ... + 34731436.

It is an arithmetic number, because the mean of its divisors is an integer number (11565033723).

Almost surely, 2^111552215566 is an apocalyptic number.

111552215566 is a deficient number, since it is larger than the sum of its proper divisors (73488324002).

111552215566 is a wasteful number, since it uses less digits than its factorization.

111552215566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69459747.

The product of its digits is 90000, while the sum is 40.

The spelling of 111552215566 in words is "one hundred eleven billion, five hundred fifty-two million, two hundred fifteen thousand, five hundred sixty-six".