13729812642 has 432 divisors, whose sum is σ = 40979457792. Its totient is φ = 3288781440.

The previous prime is 13729812617. The next prime is 13729812643. The reversal of 13729812642 is 24621892731.

It is not an unprimeable number, because it can be changed into a prime (13729812643) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 128315953 + ... + 128316059.

It is an arithmetic number, because the mean of its divisors is an integer number (94859856).

Almost surely, 2^13729812642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13729812642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20489728896).

13729812642 is an abundant number, since it is smaller than the sum of its proper divisors (27249645150).

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

13729812642 is a wasteful number, since it uses less digits than its factorization.

13729812642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 182 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 13729812642 in words is "thirteen billion, seven hundred twenty-nine million, eight hundred twelve thousand, six hundred forty-two".