27117196929 has 81 divisors (see below), whose sum is σ = 43332058497. Its totient is φ = 16966588536.

The previous prime is 27117196889. The next prime is 27117196943. The reversal of 27117196929 is 92969171172.

The square root of 27117196929 is 164673.

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

It is a tau number, because it is divible by the number of its divisors (81).

It is not a de Polignac number, because 27117196929 - 2¹³ = 27117188737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27117696929) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 253431694 + ... + 253431800.

Almost surely, 2^27117196929 is an apocalyptic number.

27117196929 is the 164673-rd square number.

27117196929 is the 82337-th centered octagonal number.

It is an amenable number.

27117196929 is a deficient number, since it is larger than the sum of its proper divisors (16214861568).

27117196929 is an frugal number, since it uses more digits than its factorization.

27117196929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 129 counting only the distinct ones).

The product of its digits is 857304, while the sum is 54.

The spelling of 27117196929 in words is "twenty-seven billion, one hundred seventeen million, one hundred ninety-six thousand, nine hundred twenty-nine".