12831050618581 has 16 divisors (see below), whose sum is σ = 13823130504960. Its totient is φ = 11839696729920.

The previous prime is 12831050618539. The next prime is 12831050618591. The reversal of 12831050618581 is 18581605013821.

It is a cyclic number.

It is not a de Polignac number, because 12831050618581 - 2⁷ = 12831050618453 is a prime.

It is a super-2 number, since 2×12831050618581² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12831050618591) 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, 641189866 + ... + 641209876.

It is an arithmetic number, because the mean of its divisors is an integer number (863945656560).

Almost surely, 2^{12831050618581} is an apocalyptic number.

It is an amenable number.

12831050618581 is a deficient number, since it is larger than the sum of its proper divisors (992079886379).

12831050618581 is a wasteful number, since it uses less digits than its factorization.

12831050618581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35676.

The product of its (nonzero) digits is 460800, while the sum is 49.

The spelling of 12831050618581 in words is "twelve trillion, eight hundred thirty-one billion, fifty million, six hundred eighteen thousand, five hundred eighty-one".