25025252549 has 24 divisors (see below), whose sum is σ = 28457436504. Its totient is φ = 21973248000.

The previous prime is 25025252423. The next prime is 25025252563. The reversal of 25025252549 is 94525252052.

It can be written as a sum of positive squares in 4 ways, for example, as 16739701924 + 8285550625 = 129382^2 + 91025^2 .

It is not a de Polignac number, because 25025252549 - 2¹² = 25025248453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25025252569) 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 23 ways as a sum of consecutive naturals, for example, 592949 + ... + 633749.

It is an arithmetic number, because the mean of its divisors is an integer number (1185726521).

Almost surely, 2^25025252549 is an apocalyptic number.

It is an amenable number.

25025252549 is a deficient number, since it is larger than the sum of its proper divisors (3432183955).

25025252549 is a wasteful number, since it uses less digits than its factorization.

25025252549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40997 (or 40986 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 25025252549 in words is "twenty-five billion, twenty-five million, two hundred fifty-two thousand, five hundred forty-nine".