27773503657 has 2 divisors, whose sum is σ = 27773503658. Its totient is φ = 27773503656.

The previous prime is 27773503643. The next prime is 27773503661. The reversal of 27773503657 is 75630537772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19569491881 + 8204011776 = 139891^2 + 90576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27773503657 is a prime.

It is not a weakly prime, because it can be changed into another prime (27773503057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13886751828 + 13886751829.

It is an arithmetic number, because the mean of its divisors is an integer number (13886751829).

Almost surely, 2^27773503657 is an apocalyptic number.

It is an amenable number.

27773503657 is a deficient number, since it is larger than the sum of its proper divisors (1).

27773503657 is an equidigital number, since it uses as much as digits as its factorization.

27773503657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6482700, while the sum is 52.

The spelling of 27773503657 in words is "twenty-seven billion, seven hundred seventy-three million, five hundred three thousand, six hundred fifty-seven".