11778906877 has 2 divisors, whose sum is σ = 11778906878. Its totient is φ = 11778906876.

The previous prime is 11778906827. The next prime is 11778906889. The reversal of 11778906877 is 77860987711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8524090276 + 3254816601 = 92326^2 + 57051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11778906877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11778906827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5889453438 + 5889453439.

It is an arithmetic number, because the mean of its divisors is an integer number (5889453439).

Almost surely, 2^11778906877 is an apocalyptic number.

It is an amenable number.

11778906877 is a deficient number, since it is larger than the sum of its proper divisors (1).

11778906877 is an equidigital number, since it uses as much as digits as its factorization.

11778906877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8297856, while the sum is 61.

The spelling of 11778906877 in words is "eleven billion, seven hundred seventy-eight million, nine hundred six thousand, eight hundred seventy-seven".