27631149693209 has 2 divisors, whose sum is σ = 27631149693210. Its totient is φ = 27631149693208.

The previous prime is 27631149693143. The next prime is 27631149693223. The reversal of 27631149693209 is 90239694113672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24748635040000 + 2882514653209 = 4974800^2 + 1697797^2 .

It is a cyclic number.

It is not a de Polignac number, because 27631149693209 - 2¹⁶ = 27631149627673 is a prime.

It is not a weakly prime, because it can be changed into another prime (27631149633209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13815574846604 + 13815574846605.

It is an arithmetic number, because the mean of its divisors is an integer number (13815574846605).

Almost surely, 2^{27631149693209} is an apocalyptic number.

It is an amenable number.

27631149693209 is a deficient number, since it is larger than the sum of its proper divisors (1).

27631149693209 is an equidigital number, since it uses as much as digits as its factorization.

27631149693209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26453952, while the sum is 62.

The spelling of 27631149693209 in words is "twenty-seven trillion, six hundred thirty-one billion, one hundred forty-nine million, six hundred ninety-three thousand, two hundred nine".