116554581 has 36 divisors (see below), whose sum is σ = 199312204. Its totient is φ = 65197440.

The previous prime is 116554561. The next prime is 116554583. The reversal of 116554581 is 185455611.

116554581 is a `hidden beast` number, since 11 + 65 + 5 + 4 + 581 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19847025 + 96707556 = 4455^2 + 9834^2 .

It is not a de Polignac number, because 116554581 - 2⁵ = 116554549 is a prime.

It is a super-2 number, since 2×116554581² = 27169940704171122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116554583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10041 + ... + 18273.

Almost surely, 2^116554581 is an apocalyptic number.

116554581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

116554581 is a deficient number, since it is larger than the sum of its proper divisors (82757623).

116554581 is a wasteful number, since it uses less digits than its factorization.

116554581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8274 (or 8260 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 116554581 is about 10796.0446923862. The cubic root of 116554581 is about 488.4758708526.

The spelling of 116554581 in words is "one hundred sixteen million, five hundred fifty-four thousand, five hundred eighty-one".