13329287680 has 80 divisors (see below), whose sum is σ = 32269970304. Its totient is φ = 5279846400.

The previous prime is 13329287677. The next prime is 13329287701. The reversal of 13329287680 is 8678292331.

It is a tau number, because it is divible by the number of its divisors (80).

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, 238405 + ... + 288955.

Almost surely, 2^13329287680 is an apocalyptic number.

13329287680 is a gapful number since it is divisible by the number (10) 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 13329287680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16134985152).

13329287680 is an abundant number, since it is smaller than the sum of its proper divisors (18940682624).

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

13329287680 is an equidigital number, since it uses as much as digits as its factorization.

13329287680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50677 (or 50661 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 13329287680 in words is "thirteen billion, three hundred twenty-nine million, two hundred eighty-seven thousand, six hundred eighty".