27425678449 has 9 divisors (see below), whose sum is σ = 29699959563. Its totient is φ = 25314023592.

The previous prime is 27425678429. The next prime is 27425678503. The reversal of 27425678449 is 94487652472.

The square root of 27425678449 is 165607.

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., 4057053025 + 23368625424 = 63695^2 + 152868^2 .

It is not a de Polignac number, because 27425678449 - 2¹¹ = 27425676401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27425678393 and 27425678402.

It is not an unprimeable number, because it can be changed into a prime (27425678419) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2146522 + ... + 2159260.

It is an arithmetic number, because the mean of its divisors is an integer number (3299995507).

Almost surely, 2^27425678449 is an apocalyptic number.

27425678449 is the 165607-th square number.

27425678449 is the 82804-th centered octagonal number.

It is an amenable number.

27425678449 is a deficient number, since it is larger than the sum of its proper divisors (2274281114).

27425678449 is an frugal number, since it uses more digits than its factorization.

27425678449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25504 (or 12752 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 58.

The spelling of 27425678449 in words is "twenty-seven billion, four hundred twenty-five million, six hundred seventy-eight thousand, four hundred forty-nine".