27168155497 has 12 divisors (see below), whose sum is σ = 31893721860. Its totient is φ = 23073343776.

The previous prime is 27168155491. The next prime is 27168155507. The reversal of 27168155497 is 79455186172.

It can be written as a sum of positive squares in 2 ways, for example, as 15200670681 + 11967484816 = 123291^2 + 109396^2 .

It is not a de Polignac number, because 27168155497 - 2²⁷ = 27033937769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27168155491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2538018 + ... + 2548699.

It is an arithmetic number, because the mean of its divisors is an integer number (2657810155).

Almost surely, 2^27168155497 is an apocalyptic number.

It is an amenable number.

27168155497 is a deficient number, since it is larger than the sum of its proper divisors (4725566363).

27168155497 is a wasteful number, since it uses less digits than its factorization.

27168155497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5086840 (or 5086833 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 55.

The spelling of 27168155497 in words is "twenty-seven billion, one hundred sixty-eight million, one hundred fifty-five thousand, four hundred ninety-seven".