11181678385 has 8 divisors (see below), whose sum is σ = 13420092456. Its totient is φ = 8943957120.

The previous prime is 11181678377. The next prime is 11181678439. The reversal of 11181678385 is 58387618111.

It can be written as a sum of positive squares in 4 ways, for example, as 603144481 + 10578533904 = 24559^2 + 102852^2 .

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

It is not a de Polignac number, because 11181678385 - 2³ = 11181678377 is a prime.

It is a Duffinian number.

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, 137004 + ... + 202813.

It is an arithmetic number, because the mean of its divisors is an integer number (1677511557).

Almost surely, 2^11181678385 is an apocalyptic number.

It is an amenable number.

11181678385 is a deficient number, since it is larger than the sum of its proper divisors (2238414071).

11181678385 is an equidigital number, since it uses as much as digits as its factorization.

11181678385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346403.

The product of its digits is 322560, while the sum is 49.

The spelling of 11181678385 in words is "eleven billion, one hundred eighty-one million, six hundred seventy-eight thousand, three hundred eighty-five".