27859437495697 has 2 divisors, whose sum is σ = 27859437495698. Its totient is φ = 27859437495696.

The previous prime is 27859437495683. The next prime is 27859437495719. The reversal of 27859437495697 is 79659473495872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27534692517201 + 324744978496 = 5247351^2 + 569864^2 .

It is a cyclic number.

It is not a de Polignac number, because 27859437495697 - 2⁷ = 27859437495569 is a prime.

It is a super-2 number, since 2×27859437495697² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27859437495397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13929718747848 + 13929718747849.

It is an arithmetic number, because the mean of its divisors is an integer number (13929718747849).

Almost surely, 2^{27859437495697} is an apocalyptic number.

It is an amenable number.

27859437495697 is a deficient number, since it is larger than the sum of its proper divisors (1).

27859437495697 is an equidigital number, since it uses as much as digits as its factorization.

27859437495697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28805414400, while the sum is 85.

The spelling of 27859437495697 in words is "twenty-seven trillion, eight hundred fifty-nine billion, four hundred thirty-seven million, four hundred ninety-five thousand, six hundred ninety-seven".