27156117497 has 2 divisors, whose sum is σ = 27156117498. Its totient is φ = 27156117496.

The previous prime is 27156117493. The next prime is 27156117533. The reversal of 27156117497 is 79471165172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24318531136 + 2837586361 = 155944^2 + 53269^2 .

It is a cyclic number.

It is not a de Polignac number, because 27156117497 - 2² = 27156117493 is a prime.

It is not a weakly prime, because it can be changed into another prime (27156117493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13578058748 + 13578058749.

It is an arithmetic number, because the mean of its divisors is an integer number (13578058749).

Almost surely, 2^27156117497 is an apocalyptic number.

It is an amenable number.

27156117497 is a deficient number, since it is larger than the sum of its proper divisors (1).

27156117497 is an equidigital number, since it uses as much as digits as its factorization.

27156117497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 50.

The spelling of 27156117497 in words is "twenty-seven billion, one hundred fifty-six million, one hundred seventeen thousand, four hundred ninety-seven".