27745196081 has 2 divisors, whose sum is σ = 27745196082. Its totient is φ = 27745196080.

The previous prime is 27745196057. The next prime is 27745196107. The reversal of 27745196081 is 18069154772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26770195456 + 975000625 = 163616^2 + 31225^2 .

It is a cyclic number.

It is not a de Polignac number, because 27745196081 - 2¹⁰ = 27745195057 is a prime.

It is a super-2 number, since 2×27745196081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27745196041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13872598040 + 13872598041.

It is an arithmetic number, because the mean of its divisors is an integer number (13872598041).

Almost surely, 2^27745196081 is an apocalyptic number.

It is an amenable number.

27745196081 is a deficient number, since it is larger than the sum of its proper divisors (1).

27745196081 is an equidigital number, since it uses as much as digits as its factorization.

27745196081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 27745196081 in words is "twenty-seven billion, seven hundred forty-five million, one hundred ninety-six thousand, eighty-one".