831642579011 has 4 divisors (see below), whose sum is σ = 831882456312. Its totient is φ = 831402701712.

The previous prime is 831642578993. The next prime is 831642579013. The reversal of 831642579011 is 110975246138.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110975246138 = 2 ⋅55487623069.

It is a cyclic number.

It is not a de Polignac number, because 831642579011 - 2¹⁸ = 831642316867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831642579013) 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, 119933450 + ... + 119940383.

It is an arithmetic number, because the mean of its divisors is an integer number (207970614078).

It is a 1-persistent number, because it is pandigital, but 2⋅831642579011 = 1663285158022 is not.

Almost surely, 2^831642579011 is an apocalyptic number.

831642579011 is a deficient number, since it is larger than the sum of its proper divisors (239877301).

831642579011 is a wasteful number, since it uses less digits than its factorization.

831642579011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239877300.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 831642579011 in words is "eight hundred thirty-one billion, six hundred forty-two million, five hundred seventy-nine thousand, eleven".