11378447777 has 2 divisors, whose sum is σ = 11378447778. Its totient is φ = 11378447776.

The previous prime is 11378447771. The next prime is 11378447807. The reversal of 11378447777 is 77774487311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8286642961 + 3091804816 = 91031^2 + 55604^2 .

It is a cyclic number.

It is not a de Polignac number, because 11378447777 - 2¹⁸ = 11378185633 is a prime.

It is not a weakly prime, because it can be changed into another prime (11378447771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5689223888 + 5689223889.

It is an arithmetic number, because the mean of its divisors is an integer number (5689223889).

Almost surely, 2^11378447777 is an apocalyptic number.

It is an amenable number.

11378447777 is a deficient number, since it is larger than the sum of its proper divisors (1).

11378447777 is an equidigital number, since it uses as much as digits as its factorization.

11378447777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6453888, while the sum is 56.

The spelling of 11378447777 in words is "eleven billion, three hundred seventy-eight million, four hundred forty-seven thousand, seven hundred seventy-seven".