25552727449 has 4 divisors (see below), whose sum is σ = 26034854436. Its totient is φ = 25070600464.

The previous prime is 25552727423. The next prime is 25552727477. The reversal of 25552727449 is 94472725552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15606255625 + 9946471824 = 124925^2 + 99732^2 .

It is a cyclic number.

It is not a de Polignac number, because 25552727449 - 2³¹ = 23405243801 is a prime.

It is a super-3 number, since 3×25552727449³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25552727396 and 25552727405.

It is not an unprimeable number, because it can be changed into a prime (25552727479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241063414 + ... + 241063519.

It is an arithmetic number, because the mean of its divisors is an integer number (6508713609).

Almost surely, 2^25552727449 is an apocalyptic number.

It is an amenable number.

25552727449 is a deficient number, since it is larger than the sum of its proper divisors (482126987).

25552727449 is an equidigital number, since it uses as much as digits as its factorization.

25552727449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482126986.

The product of its digits is 7056000, while the sum is 52.

The spelling of 25552727449 in words is "twenty-five billion, five hundred fifty-two million, seven hundred twenty-seven thousand, four hundred forty-nine".