13880780321 has 4 divisors (see below), whose sum is σ = 13881126144. Its totient is φ = 13880434500.

The previous prime is 13880780293. The next prime is 13880780339. The reversal of 13880780321 is 12308708831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13880780321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13880780351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103385 + ... + 196086.

It is an arithmetic number, because the mean of its divisors is an integer number (3470281536).

Almost surely, 2^13880780321 is an apocalyptic number.

It is an amenable number.

13880780321 is a deficient number, since it is larger than the sum of its proper divisors (345823).

13880780321 is an equidigital number, since it uses as much as digits as its factorization.

13880780321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345822.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 13880780321 in words is "thirteen billion, eight hundred eighty million, seven hundred eighty thousand, three hundred twenty-one".