27698884798729 has 9 divisors (see below), whose sum is σ = 27831897107469. Its totient is φ = 27566505238860.

The previous prime is 27698884798723. The next prime is 27698884798763. The reversal of 27698884798729 is 92789748889672.

The square root of 27698884798729 is 5262973.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 27698884798729 - 2³ = 27698884798721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27698884798721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1110474832 + ... + 1110499774.

It is an arithmetic number, because the mean of its divisors is an integer number (3092433011941).

Almost surely, 2^{27698884798729} is an apocalyptic number.

27698884798729 is the 5262973-rd square number.

27698884798729 is the 2631487-th centered octagonal number.

It is an amenable number.

27698884798729 is a deficient number, since it is larger than the sum of its proper divisors (133012308740).

27698884798729 is an frugal number, since it uses more digits than its factorization.

27698884798729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50308 (or 25154 counting only the distinct ones).

The product of its digits is 98322481152, while the sum is 94.

The spelling of 27698884798729 in words is "twenty-seven trillion, six hundred ninety-eight billion, eight hundred eighty-four million, seven hundred ninety-eight thousand, seven hundred twenty-nine".