13431487636 has 48 divisors (see below), whose sum is σ = 28503014400. Its totient is φ = 5406340608.

The previous prime is 13431487633. The next prime is 13431487637. The reversal of 13431487636 is 63678413431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431487631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198550 + ... + 257458.

It is an arithmetic number, because the mean of its divisors is an integer number (593812800).

Almost surely, 2^13431487636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13431487636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14251507200).

13431487636 is an abundant number, since it is smaller than the sum of its proper divisors (15071526764).

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

13431487636 is a wasteful number, since it uses less digits than its factorization.

13431487636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59416 (or 59414 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The spelling of 13431487636 in words is "thirteen billion, four hundred thirty-one million, four hundred eighty-seven thousand, six hundred thirty-six".