56557147271 has 2 divisors, whose sum is σ = 56557147272. Its totient is φ = 56557147270.

The previous prime is 56557147267. The next prime is 56557147301. The reversal of 56557147271 is 17274175565.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56557147271 - 2² = 56557147267 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 (56557147201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28278573635 + 28278573636.

It is an arithmetic number, because the mean of its divisors is an integer number (28278573636).

Almost surely, 2^56557147271 is an apocalyptic number.

56557147271 is a deficient number, since it is larger than the sum of its proper divisors (1).

56557147271 is an equidigital number, since it uses as much as digits as its factorization.

56557147271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2058000, while the sum is 50.

The spelling of 56557147271 in words is "fifty-six billion, five hundred fifty-seven million, one hundred forty-seven thousand, two hundred seventy-one".