111661015016 has 32 divisors (see below), whose sum is σ = 211540286880. Its totient is φ = 55251355200.

The previous prime is 111661015009. The next prime is 111661015079. The reversal of 111661015016 is 610510166111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 111661015016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764006 + ... + 898346.

It is an arithmetic number, because the mean of its divisors is an integer number (6610633965).

Almost surely, 2^111661015016 is an apocalyptic number.

It is an amenable number.

111661015016 is a deficient number, since it is larger than the sum of its proper divisors (99879271864).

111661015016 is a wasteful number, since it uses less digits than its factorization.

111661015016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135425 (or 135421 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 29.

The spelling of 111661015016 in words is "one hundred eleven billion, six hundred sixty-one million, fifteen thousand, sixteen".