9898169216779 has 4 divisors (see below), whose sum is σ = 9898209163440. Its totient is φ = 9898129270120.

The previous prime is 9898169216777. The next prime is 9898169216809. The reversal of 9898169216779 is 9776129618989.

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

It is a cyclic number.

It is not a de Polignac number, because 9898169216779 - 2¹ = 9898169216777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9898169216777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19599319 + ... + 20098000.

It is an arithmetic number, because the mean of its divisors is an integer number (2474552290860).

Almost surely, 2^{9898169216779} is an apocalyptic number.

9898169216779 is a deficient number, since it is larger than the sum of its proper divisors (39946661).

9898169216779 is a wasteful number, since it uses less digits than its factorization.

9898169216779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39946660.

The product of its digits is 1481421312, while the sum is 82.

The spelling of 9898169216779 in words is "nine trillion, eight hundred ninety-eight billion, one hundred sixty-nine million, two hundred sixteen thousand, seven hundred seventy-nine".