27057748457 has 2 divisors, whose sum is σ = 27057748458. Its totient is φ = 27057748456.

The previous prime is 27057748453. The next prime is 27057748483. The reversal of 27057748457 is 75484775072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20983260736 + 6074487721 = 144856^2 + 77939^2 .

It is a cyclic number.

It is not a de Polignac number, because 27057748457 - 2² = 27057748453 is a prime.

It is not a weakly prime, because it can be changed into another prime (27057748453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13528874228 + 13528874229.

It is an arithmetic number, because the mean of its divisors is an integer number (13528874229).

Almost surely, 2^27057748457 is an apocalyptic number.

It is an amenable number.

27057748457 is a deficient number, since it is larger than the sum of its proper divisors (1).

27057748457 is an equidigital number, since it uses as much as digits as its factorization.

27057748457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15366400, while the sum is 56.

The spelling of 27057748457 in words is "twenty-seven billion, fifty-seven million, seven hundred forty-eight thousand, four hundred fifty-seven".