111061161566 has 4 divisors (see below), whose sum is σ = 166591742352. Its totient is φ = 55530580782.

The previous prime is 111061161557. The next prime is 111061161599. The reversal of 111061161566 is 665161160111.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765290390 + ... + 27765290393.

It is an arithmetic number, because the mean of its divisors is an integer number (41647935588).

Almost surely, 2^111061161566 is an apocalyptic number.

111061161566 is a deficient number, since it is larger than the sum of its proper divisors (55530580786).

111061161566 is an equidigital number, since it uses as much as digits as its factorization.

111061161566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55530580785.

The product of its (nonzero) digits is 6480, while the sum is 35.

The spelling of 111061161566 in words is "one hundred eleven billion, sixty-one million, one hundred sixty-one thousand, five hundred sixty-six".