27027691317157 has 2 divisors, whose sum is σ = 27027691317158. Its totient is φ = 27027691317156.

The previous prime is 27027691317119. The next prime is 27027691317271. The reversal of 27027691317157 is 75171319672072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21454923746916 + 5572767570241 = 4631946^2 + 2360671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27027691317157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27027691311157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13513845658578 + 13513845658579.

It is an arithmetic number, because the mean of its divisors is an integer number (13513845658579).

Almost surely, 2^{27027691317157} is an apocalyptic number.

It is an amenable number.

27027691317157 is a deficient number, since it is larger than the sum of its proper divisors (1).

27027691317157 is an equidigital number, since it uses as much as digits as its factorization.

27027691317157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7779240, while the sum is 58.

The spelling of 27027691317157 in words is "twenty-seven trillion, twenty-seven billion, six hundred ninety-one million, three hundred seventeen thousand, one hundred fifty-seven".