99188393479569 has 15 divisors (see below), whose sum is σ = 148170450083403. Its totient is φ = 66125535897024.

The previous prime is 99188393479531. The next prime is 99188393479613. The reversal of 99188393479569 is 96597439388199.

The square root of 99188393479569 is 9959337.

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

99188393479569 is a `hidden beast` number, since 9 + 9 + 1 + 8 + 8 + 3 + 9 + 34 + 7 + 9 + 569 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9653045094225 + 89535348385344 = 3106935^2 + 9462312^2 .

It is not a de Polignac number, because 99188393479569 - 2¹¹ = 99188393477521 is a prime.

It is a super-2 number, since 2×99188393479569² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99188393479369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 89080737 + ... + 90187329.

Almost surely, 2^{99188393479569} is an apocalyptic number.

99188393479569 is the 9959337-th square number.

99188393479569 is the 4979669-th centered octagonal number.

It is an amenable number.

99188393479569 is a deficient number, since it is larger than the sum of its proper divisors (48982056603834).

99188393479569 is an frugal number, since it uses more digits than its factorization.

99188393479569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213198 (or 1106596 counting only the distinct ones).

The product of its digits is 28570268160, while the sum is 90.

The spelling of 99188393479569 in words is "ninety-nine trillion, one hundred eighty-eight billion, three hundred ninety-three million, four hundred seventy-nine thousand, five hundred sixty-nine".