27564428737 has 2 divisors, whose sum is σ = 27564428738. Its totient is φ = 27564428736.

The previous prime is 27564428719. The next prime is 27564428753. The reversal of 27564428737 is 73782446572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23032311696 + 4532117041 = 151764^2 + 67321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27564428737 is a prime.

It is not a weakly prime, because it can be changed into another prime (27564428137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13782214368 + 13782214369.

It is an arithmetic number, because the mean of its divisors is an integer number (13782214369).

Almost surely, 2^27564428737 is an apocalyptic number.

It is an amenable number.

27564428737 is a deficient number, since it is larger than the sum of its proper divisors (1).

27564428737 is an equidigital number, since it uses as much as digits as its factorization.

27564428737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15805440, while the sum is 55.

The spelling of 27564428737 in words is "twenty-seven billion, five hundred sixty-four million, four hundred twenty-eight thousand, seven hundred thirty-seven".