201255556511 has 2 divisors, whose sum is σ = 201255556512. Its totient is φ = 201255556510.

The previous prime is 201255556487. The next prime is 201255556553. The reversal of 201255556511 is 115655552102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201255556511 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201255556561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100627778255 + 100627778256.

It is an arithmetic number, because the mean of its divisors is an integer number (100627778256).

Almost surely, 2^201255556511 is an apocalyptic number.

201255556511 is a deficient number, since it is larger than the sum of its proper divisors (1).

201255556511 is an equidigital number, since it uses as much as digits as its factorization.

201255556511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75000, while the sum is 38.

The spelling of 201255556511 in words is "two hundred one billion, two hundred fifty-five million, five hundred fifty-six thousand, five hundred eleven".