56217257911 has 2 divisors, whose sum is σ = 56217257912. Its totient is φ = 56217257910.

The previous prime is 56217257807. The next prime is 56217257927. The reversal of 56217257911 is 11975271265.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56217257911 - 2¹⁵ = 56217225143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56217237911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28108628955 + 28108628956.

It is an arithmetic number, because the mean of its divisors is an integer number (28108628956).

Almost surely, 2^56217257911 is an apocalyptic number.

56217257911 is a deficient number, since it is larger than the sum of its proper divisors (1).

56217257911 is an equidigital number, since it uses as much as digits as its factorization.

56217257911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 46.

The spelling of 56217257911 in words is "fifty-six billion, two hundred seventeen million, two hundred fifty-seven thousand, nine hundred eleven".