115218166563 has 12 divisors (see below), whose sum is σ = 169566359040. Its totient is φ = 75362825616.

The previous prime is 115218166541. The next prime is 115218166571. The reversal of 115218166563 is 365661812511.

It is a happy number.

115218166563 is a `hidden beast` number, since 1 + 1 + 5 + 2 + 1 + 81 + 6 + 6 + 563 = 666.

It is not a de Polignac number, because 115218166563 - 2¹⁸ = 115217904419 is a prime.

It is a super-2 number, since 2×115218166563² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115218166573) 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 11 ways as a sum of consecutive naturals, for example, 120773283 + ... + 120774236.

It is an arithmetic number, because the mean of its divisors is an integer number (14130529920).

Almost surely, 2^115218166563 is an apocalyptic number.

115218166563 is a deficient number, since it is larger than the sum of its proper divisors (54348192477).

115218166563 is a wasteful number, since it uses less digits than its factorization.

115218166563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241547578 (or 241547575 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The spelling of 115218166563 in words is "one hundred fifteen billion, two hundred eighteen million, one hundred sixty-six thousand, five hundred sixty-three".