11323778887 has 2 divisors, whose sum is σ = 11323778888. Its totient is φ = 11323778886.

The previous prime is 11323778881. The next prime is 11323778891. The reversal of 11323778887 is 78887732311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11323778887 - 2¹⁹ = 11323254599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11323778881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5661889443 + 5661889444.

It is an arithmetic number, because the mean of its divisors is an integer number (5661889444).

Almost surely, 2^11323778887 is an apocalyptic number.

11323778887 is a deficient number, since it is larger than the sum of its proper divisors (1).

11323778887 is an equidigital number, since it uses as much as digits as its factorization.

11323778887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3161088, while the sum is 55.

The spelling of 11323778887 in words is "eleven billion, three hundred twenty-three million, seven hundred seventy-eight thousand, eight hundred eighty-seven".