27193152509 has 2 divisors, whose sum is σ = 27193152510. Its totient is φ = 27193152508.

The previous prime is 27193152473. The next prime is 27193152533. The reversal of 27193152509 is 90525139172.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23173972900 + 4019179609 = 152230^2 + 63397^2 .

It is a cyclic number.

It is not a de Polignac number, because 27193152509 - 2²⁴ = 27176375293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27193152509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27193152809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13596576254 + 13596576255.

It is an arithmetic number, because the mean of its divisors is an integer number (13596576255).

Almost surely, 2^27193152509 is an apocalyptic number.

It is an amenable number.

27193152509 is a deficient number, since it is larger than the sum of its proper divisors (1).

27193152509 is an equidigital number, since it uses as much as digits as its factorization.

27193152509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 44.

The spelling of 27193152509 in words is "twenty-seven billion, one hundred ninety-three million, one hundred fifty-two thousand, five hundred nine".