8919885455497 has 4 divisors (see below), whose sum is σ = 9444584599956. Its totient is φ = 8395186311040.

The previous prime is 8919885455491. The next prime is 8919885455501. The reversal of 8919885455497 is 7945545889198.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4084970519161 + 4834914936336 = 2021131^2 + 2198844^2 .

It is a cyclic number.

It is not a de Polignac number, because 8919885455497 - 2³ = 8919885455489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8919885455497.

It is not an unprimeable number, because it can be changed into a prime (8919885455491) 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 3 ways as a sum of consecutive naturals, for example, 262349572204 + ... + 262349572237.

It is an arithmetic number, because the mean of its divisors is an integer number (2361146149989).

Almost surely, 2^{8919885455497} is an apocalyptic number.

It is an amenable number.

8919885455497 is a deficient number, since it is larger than the sum of its proper divisors (524699144459).

8919885455497 is a wasteful number, since it uses less digits than its factorization.

8919885455497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524699144458.

The product of its digits is 5225472000, while the sum is 82.

The spelling of 8919885455497 in words is "eight trillion, nine hundred nineteen billion, eight hundred eighty-five million, four hundred fifty-five thousand, four hundred ninety-seven".