99640555655249 has 8 divisors (see below), whose sum is σ = 113875182520320. Its totient is φ = 85405994233056.

The previous prime is 99640555655243. The next prime is 99640555655309. The reversal of 99640555655249 is 94255655504699.

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

It is not a de Polignac number, because 99640555655249 - 2¹⁶ = 99640555589713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99640555655243) 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, 13053524 + ... + 19226949.

It is an arithmetic number, because the mean of its divisors is an integer number (14234397815040).

Almost surely, 2^{99640555655249} is an apocalyptic number.

It is an amenable number.

99640555655249 is a deficient number, since it is larger than the sum of its proper divisors (14234626865071).

99640555655249 is a wasteful number, since it uses less digits than its factorization.

99640555655249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32721439.

The product of its (nonzero) digits is 2624400000, while the sum is 74.

The spelling of 99640555655249 in words is "ninety-nine trillion, six hundred forty billion, five hundred fifty-five million, six hundred fifty-five thousand, two hundred forty-nine".