111616796281 has 9 divisors (see below), whose sum is σ = 113074289391. Its totient is φ = 110177866344.

The previous prime is 111616796251. The next prime is 111616796297. The reversal of 111616796281 is 182697616111.

The square root of 111616796281 is 334091.

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

It can be written as a sum of positive squares in only one way, i.e., 111194904681 + 421891600 = 333459^2 + 20540^2 .

It is not a de Polignac number, because 111616796281 - 2¹⁵ = 111616763513 is a prime.

It is a super-2 number, since 2×111616796281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111616796251) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26391075 + ... + 26395303.

Almost surely, 2^111616796281 is an apocalyptic number.

111616796281 is the 334091-st square number.

111616796281 is the 167046-th centered octagonal number.

It is an amenable number.

111616796281 is a deficient number, since it is larger than the sum of its proper divisors (1457493110).

111616796281 is an frugal number, since it uses more digits than its factorization.

111616796281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8616 (or 4308 counting only the distinct ones).

The product of its digits is 217728, while the sum is 49.

Multiplying 111616796281 by its sum of digits (49), we get a square (5469223017769 = 2338637²).

The spelling of 111616796281 in words is "one hundred eleven billion, six hundred sixteen million, seven hundred ninety-six thousand, two hundred eighty-one".