27173214649 has 9 divisors (see below), whose sum is σ = 31611000207. Its totient is φ = 23290337784.

The previous prime is 27173214631. The next prime is 27173214661. The reversal of 27173214649 is 94641237172.

The square root of 27173214649 is 164843.

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

It can be written as a sum of positive squares in only one way, i.e., 20766249 + 27152448400 = 4557^2 + 164780^2 .

It is not a de Polignac number, because 27173214649 - 2⁷ = 27173214521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27173214599 and 27173214608.

It is not an unprimeable number, because it can be changed into a prime (27173214619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1142127 + ... + 1165675.

Almost surely, 2^27173214649 is an apocalyptic number.

27173214649 is the 164843-rd square number.

27173214649 is the 82422-nd centered octagonal number.

It is an amenable number.

27173214649 is a deficient number, since it is larger than the sum of its proper divisors (4437785558).

27173214649 is an frugal number, since it uses more digits than its factorization.

27173214649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47112 (or 23556 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The spelling of 27173214649 in words is "twenty-seven billion, one hundred seventy-three million, two hundred fourteen thousand, six hundred forty-nine".