13880156216845 has 4 divisors (see below), whose sum is σ = 16656187460220. Its totient is φ = 11104124973472.

The previous prime is 13880156216809. The next prime is 13880156216911. The reversal of 13880156216845 is 54861265108831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7105577965641 + 6774578251204 = 2665629^2 + 2602802^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13880156216845 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 13880156216845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388015621680 + ... + 1388015621689.

It is an arithmetic number, because the mean of its divisors is an integer number (4164046865055).

Almost surely, 2^{13880156216845} is an apocalyptic number.

It is an amenable number.

13880156216845 is a deficient number, since it is larger than the sum of its proper divisors (2776031243375).

13880156216845 is an equidigital number, since it uses as much as digits as its factorization.

13880156216845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776031243374.

The product of its (nonzero) digits is 11059200, while the sum is 58.

The spelling of 13880156216845 in words is "thirteen trillion, eight hundred eighty billion, one hundred fifty-six million, two hundred sixteen thousand, eight hundred forty-five".