111866381061 has 8 divisors (see below), whose sum is σ = 149156727744. Its totient is φ = 74576810880.

The previous prime is 111866381059. The next prime is 111866381089. The reversal of 111866381061 is 160183668111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111866381061 - 2¹ = 111866381059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111866383061) 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, 415720 + ... + 629726.

It is an arithmetic number, because the mean of its divisors is an integer number (18644590968).

Almost surely, 2^111866381061 is an apocalyptic number.

It is an amenable number.

111866381061 is a deficient number, since it is larger than the sum of its proper divisors (37290346683).

111866381061 is a wasteful number, since it uses less digits than its factorization.

111866381061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388251.

The product of its (nonzero) digits is 41472, while the sum is 42.

The spelling of 111866381061 in words is "one hundred eleven billion, eight hundred sixty-six million, three hundred eighty-one thousand, sixty-one".