27269432821 has 2 divisors, whose sum is σ = 27269432822. Its totient is φ = 27269432820.

The previous prime is 27269432791. The next prime is 27269432837. The reversal of 27269432821 is 12823496272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25031669796 + 2237763025 = 158214^2 + 47305^2 .

It is a cyclic number.

It is not a de Polignac number, because 27269432821 - 2¹⁷ = 27269301749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27269432321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13634716410 + 13634716411.

It is an arithmetic number, because the mean of its divisors is an integer number (13634716411).

Almost surely, 2^27269432821 is an apocalyptic number.

27269432821 is the 95341-st hex number.

It is an amenable number.

27269432821 is a deficient number, since it is larger than the sum of its proper divisors (1).

27269432821 is an equidigital number, since it uses as much as digits as its factorization.

27269432821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 46.

The spelling of 27269432821 in words is "twenty-seven billion, two hundred sixty-nine million, four hundred thirty-two thousand, eight hundred twenty-one".