99426085815169 has 9 divisors (see below), whose sum is σ = 99613648834947. Its totient is φ = 99238875352344.

The previous prime is 99426085815149. The next prime is 99426085815229. The reversal of 99426085815169 is 96151858062499.

The square root of 99426085815169 is 9971263.

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., 99338836470769 + 87249344400 = 9966887^2 + 295380^2 .

It is not a de Polignac number, because 99426085815169 - 2²⁵ = 99426052260737 is a prime.

It is a super-2 number, since 2×99426085815169² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99426085815149) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5454271747 + ... + 5454289975.

It is an arithmetic number, because the mean of its divisors is an integer number (11068183203883).

Almost surely, 2^{99426085815169} is an apocalyptic number.

99426085815169 is the 9971263-rd square number.

99426085815169 is the 4985632-nd centered octagonal number.

It is an amenable number.

99426085815169 is a deficient number, since it is larger than the sum of its proper divisors (187563019778).

99426085815169 is an frugal number, since it uses more digits than its factorization.

99426085815169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37552 (or 18776 counting only the distinct ones).

The product of its (nonzero) digits is 335923200, while the sum is 73.

The spelling of 99426085815169 in words is "ninety-nine trillion, four hundred twenty-six billion, eighty-five million, eight hundred fifteen thousand, one hundred sixty-nine".