13351331784 has 128 divisors (see below), whose sum is σ = 39253294080. Its totient is φ = 3705004800.

The previous prime is 13351331771. The next prime is 13351331821. The reversal of 13351331784 is 48713315331.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1302439 + ... + 1312649.

It is an arithmetic number, because the mean of its divisors is an integer number (306666360).

Almost surely, 2^13351331784 is an apocalyptic number.

13351331784 is a gapful number since it is divisible by the number (14) 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 13351331784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19626647040).

13351331784 is an abundant number, since it is smaller than the sum of its proper divisors (25901962296).

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

13351331784 is a wasteful number, since it uses less digits than its factorization.

13351331784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10451 (or 10447 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The spelling of 13351331784 in words is "thirteen billion, three hundred fifty-one million, three hundred thirty-one thousand, seven hundred eighty-four".