11727778345 has 8 divisors (see below), whose sum is σ = 14111066376. Its totient is φ = 9357067776.

The previous prime is 11727778343. The next prime is 11727778357. The reversal of 11727778345 is 54387772711.

11727778345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 404496 + 11727373849 = 636^2 + 108293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11727778345 - 2¹ = 11727778343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11727778292 and 11727778301.

It is not an unprimeable number, because it can be changed into a prime (11727778343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3142312 + ... + 3146041.

It is an arithmetic number, because the mean of its divisors is an integer number (1763883297).

Almost surely, 2^11727778345 is an apocalyptic number.

It is an amenable number.

11727778345 is a deficient number, since it is larger than the sum of its proper divisors (2383288031).

11727778345 is an equidigital number, since it uses as much as digits as its factorization.

11727778345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6288731.

The product of its digits is 2304960, while the sum is 52.

The spelling of 11727778345 in words is "eleven billion, seven hundred twenty-seven million, seven hundred seventy-eight thousand, three hundred forty-five".