115061166166581 has 12 divisors (see below), whose sum is σ = 173425525816608. Its totient is φ = 73372337845224.

The previous prime is 115061166166579. The next prime is 115061166166591. The reversal of 115061166166581 is 185661661160511.

115061166166581 is a `hidden beast` number, since 1 + 1 + 5 + 0 + 6 + 1 + 16 + 616 + 6 + 5 + 8 + 1 = 666.

It is not a de Polignac number, because 115061166166581 - 2¹ = 115061166166579 is a prime.

It is a super-2 number, since 2×115061166166581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115061166166571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277925521935 + ... + 277925522348.

It is an arithmetic number, because the mean of its divisors is an integer number (14452127151384).

Almost surely, 2^{115061166166581} is an apocalyptic number.

It is an amenable number.

115061166166581 is a deficient number, since it is larger than the sum of its proper divisors (58364359650027).

115061166166581 is a wasteful number, since it uses less digits than its factorization.

115061166166581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555851044312 (or 555851044309 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 54.

The spelling of 115061166166581 in words is "one hundred fifteen trillion, sixty-one billion, one hundred sixty-six million, one hundred sixty-six thousand, five hundred eighty-one".