9129557994 has 16 divisors (see below), whose sum is σ = 18261816768. Its totient is φ = 3042735872.

The previous prime is 9129557909. The next prime is 9129558023. The reversal of 9129557994 is 4997559219.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67182 + ... + 150905.

It is an arithmetic number, because the mean of its divisors is an integer number (1141363548).

Almost surely, 2^9129557994 is an apocalyptic number.

9129557994 is an abundant number, since it is smaller than the sum of its proper divisors (9132258774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9129557994 is a wasteful number, since it uses less digits than its factorization.

9129557994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225069.

The product of its digits is 9185400, while the sum is 60.

The square root of 9129557994 is about 95548.7205251855. The cubic root of 9129557994 is about 2090.0174745759.

The spelling of 9129557994 in words is "nine billion, one hundred twenty-nine million, five hundred fifty-seven thousand, nine hundred ninety-four".