111850782481 has 27 divisors (see below), whose sum is σ = 120613499643. Its totient is φ = 103703465280.

The previous prime is 111850782451. The next prime is 111850782599. The reversal of 111850782481 is 184287058111.

The square root of 111850782481 is 334441.

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., 87081059025 + 24769723456 = 295095^2 + 157384^2 .

It is not a de Polignac number, because 111850782481 - 2²¹ = 111848685329 is a prime.

It is a super-2 number, since 2×111850782481² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111850782451) 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 26 ways as a sum of consecutive naturals, for example, 585606096 + ... + 585606286.

Almost surely, 2^111850782481 is an apocalyptic number.

111850782481 is the 334441-st square number.

111850782481 is the 167221-st centered octagonal number.

It is an amenable number.

111850782481 is a deficient number, since it is larger than the sum of its proper divisors (8762717162).

111850782481 is an frugal number, since it uses more digits than its factorization.

111850782481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 46.

The spelling of 111850782481 in words is "one hundred eleven billion, eight hundred fifty million, seven hundred eighty-two thousand, four hundred eighty-one".