27220502681 has 2 divisors, whose sum is σ = 27220502682. Its totient is φ = 27220502680.

The previous prime is 27220502671. The next prime is 27220502717. The reversal of 27220502681 is 18620502272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15448252681 + 11772250000 = 124291^2 + 108500^2 .

It is a cyclic number.

It is not a de Polignac number, because 27220502681 - 2³⁴ = 10040633497 is a prime.

It is a super-2 number, since 2×27220502681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27220502641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13610251340 + 13610251341.

It is an arithmetic number, because the mean of its divisors is an integer number (13610251341).

Almost surely, 2^27220502681 is an apocalyptic number.

It is an amenable number.

27220502681 is a deficient number, since it is larger than the sum of its proper divisors (1).

27220502681 is an equidigital number, since it uses as much as digits as its factorization.

27220502681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 27220502681 in words is "twenty-seven billion, two hundred twenty million, five hundred two thousand, six hundred eighty-one".