8129392845 has 16 divisors (see below), whose sum is σ = 14865175680. Its totient is φ = 3716293824.

The previous prime is 8129392841. The next prime is 8129392879. The reversal of 8129392845 is 5482939218.

It is not a de Polignac number, because 8129392845 - 2² = 8129392841 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8129392841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38711290 + ... + 38711499.

It is an arithmetic number, because the mean of its divisors is an integer number (929073480).

Almost surely, 2^8129392845 is an apocalyptic number.

It is an amenable number.

8129392845 is a deficient number, since it is larger than the sum of its proper divisors (6735782835).

8129392845 is a wasteful number, since it uses less digits than its factorization.

8129392845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77422804.

The product of its digits is 1244160, while the sum is 51.

The square root of 8129392845 is about 90163.1457137560. The cubic root of 8129392845 is about 2010.7251201743.

The spelling of 8129392845 in words is "eight billion, one hundred twenty-nine million, three hundred ninety-two thousand, eight hundred forty-five".