25725914449 has 9 divisors (see below), whose sum is σ = 25985926057. Its totient is φ = 25468483684.

The previous prime is 25725914399. The next prime is 25725914497. The reversal of 25725914449 is 94441952752.

The square root of 25725914449 is 160393.

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

It is not a de Polignac number, because 25725914449 - 2⁷ = 25725914321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25725914396 and 25725914405.

It is not an unprimeable number, because it can be changed into a prime (25725914549) 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, 17161302 + ... + 17162800.

Almost surely, 2^25725914449 is an apocalyptic number.

25725914449 is the 160393-rd square number.

25725914449 is the 80197-th centered octagonal number.

It is an amenable number.

25725914449 is a deficient number, since it is larger than the sum of its proper divisors (260011608).

25725914449 is an frugal number, since it uses more digits than its factorization.

25725914449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212 (or 1606 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 52.

The spelling of 25725914449 in words is "twenty-five billion, seven hundred twenty-five million, nine hundred fourteen thousand, four hundred forty-nine".