25045278049 has 9 divisors (see below), whose sum is σ = 27531020881. Its totient is φ = 22766852020.

The previous prime is 25045278029. The next prime is 25045278121. The reversal of 25045278049 is 94087254052.

The square root of 25045278049 is 158257.

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

It is not a de Polignac number, because 25045278049 - 2¹⁹ = 25044753761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25045278029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1733634 + ... + 1748020.

Almost surely, 2^25045278049 is an apocalyptic number.

25045278049 is the 158257-th square number.

25045278049 is the 79129-th centered octagonal number.

It is an amenable number.

25045278049 is a deficient number, since it is larger than the sum of its proper divisors (2485742832).

25045278049 is an frugal number, since it uses more digits than its factorization.

25045278049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28796 (or 14398 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 25045278049 in words is "twenty-five billion, forty-five million, two hundred seventy-eight thousand, forty-nine".