27505507751 has 2 divisors, whose sum is σ = 27505507752. Its totient is φ = 27505507750.

The previous prime is 27505507699. The next prime is 27505507759. The reversal of 27505507751 is 15770550572.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27505507751 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 (27505507759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13752753875 + 13752753876.

It is an arithmetic number, because the mean of its divisors is an integer number (13752753876).

Almost surely, 2^27505507751 is an apocalyptic number.

27505507751 is a deficient number, since it is larger than the sum of its proper divisors (1).

27505507751 is an equidigital number, since it uses as much as digits as its factorization.

27505507751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428750, while the sum is 44.

The spelling of 27505507751 in words is "twenty-seven billion, five hundred five million, five hundred seven thousand, seven hundred fifty-one".