9199905124991 has 8 divisors (see below), whose sum is σ = 10662264290304. Its totient is φ = 7774567710840.

The previous prime is 9199905124933. The next prime is 9199905125017. The reversal of 9199905124991 is 1994215099919.

9199905124991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9199905124991 - 2¹⁴ = 9199905108607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9199905124901) 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, 9255437255 + ... + 9255438248.

It is an arithmetic number, because the mean of its divisors is an integer number (1332783036288).

Almost surely, 2^{9199905124991} is an apocalyptic number.

9199905124991 is a deficient number, since it is larger than the sum of its proper divisors (1462359165313).

9199905124991 is a wasteful number, since it uses less digits than its factorization.

9199905124991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18510875581.

The product of its (nonzero) digits is 21257640, while the sum is 68.

The spelling of 9199905124991 in words is "nine trillion, one hundred ninety-nine billion, nine hundred five million, one hundred twenty-four thousand, nine hundred ninety-one".