12591423040 has 112 divisors (see below), whose sum is σ = 34307995392. Its totient is φ = 4311853056.

The previous prime is 12591423011. The next prime is 12591423049. The reversal of 12591423040 is 4032419521.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 12591422993 and 12591423011.

It is not an unprimeable number, because it can be changed into a prime (12591423049) 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, 2163174 + ... + 2168986.

Almost surely, 2^12591423040 is an apocalyptic number.

12591423040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12591423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17153997696).

12591423040 is an abundant number, since it is smaller than the sum of its proper divisors (21716572352).

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

12591423040 is an equidigital number, since it uses as much as digits as its factorization.

12591423040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804 (or 6794 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 12591423040 in words is "twelve billion, five hundred ninety-one million, four hundred twenty-three thousand, forty".