831599421345 has 48 divisors (see below), whose sum is σ = 1797118756992. Its totient is φ = 345599758080.

The previous prime is 831599421259. The next prime is 831599421349. The reversal of 831599421345 is 543124995138.

831599421345 is a `hidden beast` number, since 8 + 3 + 1 + 599 + 4 + 2 + 1 + 3 + 45 = 666.

It is not a de Polignac number, because 831599421345 - 2¹⁰ = 831599420321 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 831599421291 and 831599421300.

It is not an unprimeable number, because it can be changed into a prime (831599421349) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119996452 + ... + 120003381.

It is an arithmetic number, because the mean of its divisors is an integer number (37439974104).

Almost surely, 2^831599421345 is an apocalyptic number.

It is an amenable number.

831599421345 is an abundant number, since it is smaller than the sum of its proper divisors (965519335647).

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

831599421345 is a wasteful number, since it uses less digits than its factorization.

831599421345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239999862 (or 239999859 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 831599421345 in words is "eight hundred thirty-one billion, five hundred ninety-nine million, four hundred twenty-one thousand, three hundred forty-five".