831648587421 has 16 divisors (see below), whose sum is σ = 1110368994944. Its totient is φ = 553680658944.

The previous prime is 831648587381. The next prime is 831648587447. The reversal of 831648587421 is 124785846138.

831648587421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 831648587421 - 2¹¹ = 831648585373 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 (831648587821) 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, 9287961 + ... + 9377073.

It is an arithmetic number, because the mean of its divisors is an integer number (69398062184).

Almost surely, 2^831648587421 is an apocalyptic number.

It is an amenable number.

831648587421 is a deficient number, since it is larger than the sum of its proper divisors (278720407523).

831648587421 is a wasteful number, since it uses less digits than its factorization.

831648587421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93300.

The product of its digits is 10321920, while the sum is 57.

The spelling of 831648587421 in words is "eight hundred thirty-one billion, six hundred forty-eight million, five hundred eighty-seven thousand, four hundred twenty-one".