111661037776 has 20 divisors (see below), whose sum is σ = 219889873444. Its totient is φ = 54915264000.

The previous prime is 111661037759. The next prime is 111661037779. The reversal of 111661037776 is 677730166111.

It can be written as a sum of positive squares in 2 ways, for example, as 1662682176 + 109998355600 = 40776^2 + 331660^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111661037779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57202425 + ... + 57204376.

Almost surely, 2^111661037776 is an apocalyptic number.

111661037776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

111661037776 is a deficient number, since it is larger than the sum of its proper divisors (108228835668).

111661037776 is a wasteful number, since it uses less digits than its factorization.

111661037776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114406870 (or 114406864 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 46.

The spelling of 111661037776 in words is "one hundred eleven billion, six hundred sixty-one million, thirty-seven thousand, seven hundred seventy-six".