27747520457 has 2 divisors, whose sum is σ = 27747520458. Its totient is φ = 27747520456.

The previous prime is 27747520441. The next prime is 27747520469. The reversal of 27747520457 is 75402574772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27661011856 + 86508601 = 166316^2 + 9301^2 .

It is a cyclic number.

It is not a de Polignac number, because 27747520457 - 2⁴ = 27747520441 is a prime.

It is not a weakly prime, because it can be changed into another prime (27747520417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13873760228 + 13873760229.

It is an arithmetic number, because the mean of its divisors is an integer number (13873760229).

Almost surely, 2^27747520457 is an apocalyptic number.

It is an amenable number.

27747520457 is a deficient number, since it is larger than the sum of its proper divisors (1).

27747520457 is an equidigital number, since it uses as much as digits as its factorization.

27747520457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3841600, while the sum is 50.

The spelling of 27747520457 in words is "twenty-seven billion, seven hundred forty-seven million, five hundred twenty thousand, four hundred fifty-seven".