11181678377 has 2 divisors, whose sum is σ = 11181678378. Its totient is φ = 11181678376.

The previous prime is 11181678371. The next prime is 11181678439. The reversal of 11181678377 is 77387618111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5768250601 + 5413427776 = 75949^2 + 73576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11181678377 is a prime.

It is not a weakly prime, because it can be changed into another prime (11181678371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5590839188 + 5590839189.

It is an arithmetic number, because the mean of its divisors is an integer number (5590839189).

Almost surely, 2^11181678377 is an apocalyptic number.

It is an amenable number.

11181678377 is a deficient number, since it is larger than the sum of its proper divisors (1).

11181678377 is an equidigital number, since it uses as much as digits as its factorization.

11181678377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 50.

The spelling of 11181678377 in words is "eleven billion, one hundred eighty-one million, six hundred seventy-eight thousand, three hundred seventy-seven".