13145721088 has 72 divisors (see below), whose sum is σ = 26747784000. Its totient is φ = 6446229504.

The previous prime is 13145721077. The next prime is 13145721101. The reversal of 13145721088 is 88012754131.

It is a self number, because there is not a number n which added to its sum of digits gives 13145721088.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9046570 + ... + 9048022.

It is an arithmetic number, because the mean of its divisors is an integer number (371497000).

Almost surely, 2^13145721088 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 13145721088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13373892000).

13145721088 is an abundant number, since it is smaller than the sum of its proper divisors (13602062912).

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

13145721088 is an equidigital number, since it uses as much as digits as its factorization.

13145721088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 13145721088 in words is "thirteen billion, one hundred forty-five million, seven hundred twenty-one thousand, eighty-eight".