27857245543 has 2 divisors, whose sum is σ = 27857245544. Its totient is φ = 27857245542.

The previous prime is 27857245463. The next prime is 27857245589. The reversal of 27857245543 is 34554275872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27857245543 - 2¹⁷ = 27857114471 is a prime.

It is a super-2 number, since 2×27857245543² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27857245043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13928622771 + 13928622772.

It is an arithmetic number, because the mean of its divisors is an integer number (13928622772).

Almost surely, 2^27857245543 is an apocalyptic number.

27857245543 is a deficient number, since it is larger than the sum of its proper divisors (1).

27857245543 is an equidigital number, since it uses as much as digits as its factorization.

27857245543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408000, while the sum is 52.

The spelling of 27857245543 in words is "twenty-seven billion, eight hundred fifty-seven million, two hundred forty-five thousand, five hundred forty-three".