9855971711 has 2 divisors, whose sum is σ = 9855971712. Its totient is φ = 9855971710.

The previous prime is 9855971693. The next prime is 9855971717. The reversal of 9855971711 is 1171795589.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9855971711 - 2¹⁰ = 9855970687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9855971717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4927985855 + 4927985856.

It is an arithmetic number, because the mean of its divisors is an integer number (4927985856).

Almost surely, 2^9855971711 is an apocalyptic number.

9855971711 is a deficient number, since it is larger than the sum of its proper divisors (1).

9855971711 is an equidigital number, since it uses as much as digits as its factorization.

9855971711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 53.

The square root of 9855971711 is about 99277.2466932882. The cubic root of 9855971711 is about 2144.0413130840.

The spelling of 9855971711 in words is "nine billion, eight hundred fifty-five million, nine hundred seventy-one thousand, seven hundred eleven".