27128724653 has 2 divisors, whose sum is σ = 27128724654. Its totient is φ = 27128724652.

The previous prime is 27128724541. The next prime is 27128724671. The reversal of 27128724653 is 35642782172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18236611849 + 8892112804 = 135043^2 + 94298^2 .

It is a cyclic number.

It is not a de Polignac number, because 27128724653 - 2²⁴ = 27111947437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27128724598 and 27128724607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27128724673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13564362326 + 13564362327.

It is an arithmetic number, because the mean of its divisors is an integer number (13564362327).

Almost surely, 2^27128724653 is an apocalyptic number.

It is an amenable number.

27128724653 is a deficient number, since it is larger than the sum of its proper divisors (1).

27128724653 is an equidigital number, since it uses as much as digits as its factorization.

27128724653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 47.

The spelling of 27128724653 in words is "twenty-seven billion, one hundred twenty-eight million, seven hundred twenty-four thousand, six hundred fifty-three".