27156404717 has 16 divisors (see below), whose sum is σ = 29638633920. Its totient is φ = 24731194752.

The previous prime is 27156404713. The next prime is 27156404729. The reversal of 27156404717 is 71740465172.

It is a cyclic number.

It is not a de Polignac number, because 27156404717 - 2² = 27156404713 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27156404713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780353 + ... + 814409.

It is an arithmetic number, because the mean of its divisors is an integer number (1852414620).

Almost surely, 2^27156404717 is an apocalyptic number.

It is an amenable number.

27156404717 is a deficient number, since it is larger than the sum of its proper divisors (2482229203).

27156404717 is a wasteful number, since it uses less digits than its factorization.

27156404717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34892.

The product of its (nonzero) digits is 329280, while the sum is 44.

Adding to 27156404717 its reverse (71740465172), we get a palindrome (98896869889).

The spelling of 27156404717 in words is "twenty-seven billion, one hundred fifty-six million, four hundred four thousand, seven hundred seventeen".