111999169357156 has 81 divisors (see below), whose sum is σ = 204239572468659. Its totient is φ = 53738184754800.

The previous prime is 111999169357087. The next prime is 111999169357157. The reversal of 111999169357156 is 651753961999111.

The square root of 111999169357156 is 10582966.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111999169357157) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 85954849201 + ... + 85954850503.

Almost surely, 2^{111999169357156} is an apocalyptic number.

111999169357156 is the 10582966-th square number.

It is an amenable number.

111999169357156 is a deficient number, since it is larger than the sum of its proper divisors (92240403111503).

111999169357156 is an frugal number, since it uses more digits than its factorization.

111999169357156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2934 (or 1467 counting only the distinct ones).

The product of its digits is 124002900, while the sum is 73.

The spelling of 111999169357156 in words is "one hundred eleven trillion, nine hundred ninety-nine billion, one hundred sixty-nine million, three hundred fifty-seven thousand, one hundred fifty-six".