2505550811 has 2 divisors, whose sum is σ = 2505550812. Its totient is φ = 2505550810.

The previous prime is 2505550771. The next prime is 2505550813. The reversal of 2505550811 is 1180555052.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505550811 is a prime.

Together with 2505550813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2505550813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252775405 + 1252775406.

It is an arithmetic number, because the mean of its divisors is an integer number (1252775406).

Almost surely, 2^2505550811 is an apocalyptic number.

2505550811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505550811 is an equidigital number, since it uses as much as digits as its factorization.

2505550811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10000, while the sum is 32.

The square root of 2505550811 is about 50055.4773326556. The cubic root of 2505550811 is about 1358.2125470660.

The spelling of 2505550811 in words is "two billion, five hundred five million, five hundred fifty thousand, eight hundred eleven".