99899946161 has 4 divisors (see below), whose sum is σ = 99920434932. Its totient is φ = 99879457392.

The previous prime is 99899946151. The next prime is 99899946169. The reversal of 99899946161 is 16164999899.

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 50644801936 + 49255144225 = 225044^2 + 221935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99899946161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99899946169) 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, 10237070 + ... + 10246823.

It is an arithmetic number, because the mean of its divisors is an integer number (24980108733).

Almost surely, 2^99899946161 is an apocalyptic number.

It is an amenable number.

99899946161 is a deficient number, since it is larger than the sum of its proper divisors (20488771).

99899946161 is a wasteful number, since it uses less digits than its factorization.

99899946161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20488770.

The product of its digits is 68024448, while the sum is 71.

The spelling of 99899946161 in words is "ninety-nine billion, eight hundred ninety-nine million, nine hundred forty-six thousand, one hundred sixty-one".