13591831456 has 96 divisors (see below), whose sum is σ = 32001758208. Its totient is φ = 5559736320.

The previous prime is 13591831427. The next prime is 13591831457. The reversal of 13591831456 is 65413819531.

It is a super-2 number, since 2×13591831456² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13591831457) 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, 493506 + ... + 520318.

It is an arithmetic number, because the mean of its divisors is an integer number (333351648).

Almost surely, 2^13591831456 is an apocalyptic number.

13591831456 is a gapful number since it is divisible by the number (16) 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 13591831456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16000879104).

13591831456 is an abundant number, since it is smaller than the sum of its proper divisors (18409926752).

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

13591831456 is a wasteful number, since it uses less digits than its factorization.

13591831456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26934 (or 26926 counting only the distinct ones).

The product of its digits is 388800, while the sum is 46.

The spelling of 13591831456 in words is "thirteen billion, five hundred ninety-one million, eight hundred thirty-one thousand, four hundred fifty-six".