9231391512856 has 32 divisors (see below), whose sum is σ = 18627470354880. Its totient is φ = 4272968102400.

The previous prime is 9231391512853. The next prime is 9231391512899. The reversal of 9231391512856 is 6582151931329.

9231391512856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9231391512797 and 9231391512806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9231391512853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556367760 + ... + 556384351.

It is an arithmetic number, because the mean of its divisors is an integer number (582108448590).

Almost surely, 2^{9231391512856} is an apocalyptic number.

It is an amenable number.

9231391512856 is an abundant number, since it is smaller than the sum of its proper divisors (9396078842024).

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

9231391512856 is a wasteful number, since it uses less digits than its factorization.

9231391512856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112752195 (or 1112752191 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 55.

The spelling of 9231391512856 in words is "nine trillion, two hundred thirty-one billion, three hundred ninety-one million, five hundred twelve thousand, eight hundred fifty-six".