27128358097 has 2 divisors, whose sum is σ = 27128358098. Its totient is φ = 27128358096.

The previous prime is 27128358091. The next prime is 27128358143. The reversal of 27128358097 is 79085382172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26163386001 + 964972096 = 161751^2 + 31064^2 .

It is a cyclic number.

It is not a de Polignac number, because 27128358097 - 2¹⁹ = 27127833809 is a prime.

It is a super-2 number, since 2×27128358097² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27128358091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13564179048 + 13564179049.

It is an arithmetic number, because the mean of its divisors is an integer number (13564179049).

Almost surely, 2^27128358097 is an apocalyptic number.

It is an amenable number.

27128358097 is a deficient number, since it is larger than the sum of its proper divisors (1).

27128358097 is an equidigital number, since it uses as much as digits as its factorization.

27128358097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 27128358097 in words is "twenty-seven billion, one hundred twenty-eight million, three hundred fifty-eight thousand, ninety-seven".