27159690782069 has 2 divisors, whose sum is σ = 27159690782070. Its totient is φ = 27159690782068.

The previous prime is 27159690781931. The next prime is 27159690782101. The reversal of 27159690782069 is 96028709695172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23987337949969 + 3172352832100 = 4897687^2 + 1781110^2 .

It is a cyclic number.

It is not a de Polignac number, because 27159690782069 - 2²⁸ = 27159422346613 is a prime.

It is a super-2 number, since 2×27159690782069² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27159690781993 and 27159690782011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27159690782269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13579845391034 + 13579845391035.

It is an arithmetic number, because the mean of its divisors is an integer number (13579845391035).

Almost surely, 2^{27159690782069} is an apocalyptic number.

It is an amenable number.

27159690782069 is a deficient number, since it is larger than the sum of its proper divisors (1).

27159690782069 is an equidigital number, since it uses as much as digits as its factorization.

27159690782069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 205752960, while the sum is 71.

The spelling of 27159690782069 in words is "twenty-seven trillion, one hundred fifty-nine billion, six hundred ninety million, seven hundred eighty-two thousand, sixty-nine".