99609009956 has 12 divisors (see below), whose sum is σ = 174480068700. Its totient is φ = 49757561760.

The previous prime is 99609009953. The next prime is 99609009961. The reversal of 99609009956 is 65990090699.

It can be written as a sum of positive squares in 2 ways, for example, as 59375068900 + 40233941056 = 243670^2 + 200584^2 .

It is not an unprimeable number, because it can be changed into a prime (99609009953) 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, 11731031 + ... + 11739518.

It is an arithmetic number, because the mean of its divisors is an integer number (14540005725).

Almost surely, 2^99609009956 is an apocalyptic number.

It is an amenable number.

99609009956 is a deficient number, since it is larger than the sum of its proper divisors (74871058744).

99609009956 is a wasteful number, since it uses less digits than its factorization.

99609009956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23471614 (or 23471612 counting only the distinct ones).

The product of its (nonzero) digits is 10628820, while the sum is 62.

The spelling of 99609009956 in words is "ninety-nine billion, six hundred nine million, nine thousand, nine hundred fifty-six".