99217146779 has 8 divisors (see below), whose sum is σ = 100705089600. Its totient is φ = 97729412616.

The previous prime is 99217146719. The next prime is 99217146803. The reversal of 99217146779 is 97764171299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99217146779 - 2³⁶ = 30497670043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99217146719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092872 + ... + 1180170.

It is an arithmetic number, because the mean of its divisors is an integer number (12588136200).

Almost surely, 2^99217146779 is an apocalyptic number.

99217146779 is a deficient number, since it is larger than the sum of its proper divisors (1487942821).

99217146779 is a wasteful number, since it uses less digits than its factorization.

99217146779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104329.

The product of its digits is 12002256, while the sum is 62.

The spelling of 99217146779 in words is "ninety-nine billion, two hundred seventeen million, one hundred forty-six thousand, seven hundred seventy-nine".