13447780369 has 4 divisors (see below), whose sum is σ = 14032466496. Its totient is φ = 12863094244.

The previous prime is 13447780303. The next prime is 13447780387. The reversal of 13447780369 is 96308774431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96308774431 = 59 ⋅1632352109.

It is a cyclic number.

It is not a de Polignac number, because 13447780369 - 2¹⁵ = 13447747601 is a prime.

It is a super-2 number, since 2×13447780369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13447780169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292343029 + ... + 292343074.

It is an arithmetic number, because the mean of its divisors is an integer number (3508116624).

Almost surely, 2^13447780369 is an apocalyptic number.

It is an amenable number.

13447780369 is a deficient number, since it is larger than the sum of its proper divisors (584686127).

13447780369 is an equidigital number, since it uses as much as digits as its factorization.

13447780369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584686126.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 13447780369 in words is "thirteen billion, four hundred forty-seven million, seven hundred eighty thousand, three hundred sixty-nine".