27750557543 has 2 divisors, whose sum is σ = 27750557544. Its totient is φ = 27750557542.

The previous prime is 27750557509. The next prime is 27750557551. The reversal of 27750557543 is 34575505772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27750557543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27750557491 and 27750557500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27750557503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13875278771 + 13875278772.

It is an arithmetic number, because the mean of its divisors is an integer number (13875278772).

Almost surely, 2^27750557543 is an apocalyptic number.

27750557543 is a deficient number, since it is larger than the sum of its proper divisors (1).

27750557543 is an equidigital number, since it uses as much as digits as its factorization.

27750557543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5145000, while the sum is 50.

The spelling of 27750557543 in words is "twenty-seven billion, seven hundred fifty million, five hundred fifty-seven thousand, five hundred forty-three".