25332550549 has 2 divisors, whose sum is σ = 25332550550. Its totient is φ = 25332550548.

The previous prime is 25332550531. The next prime is 25332550571. The reversal of 25332550549 is 94505523352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19281266449 + 6051284100 = 138857^2 + 77790^2 .

It is a cyclic number.

It is not a de Polignac number, because 25332550549 - 2¹⁷ = 25332419477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25332553549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12666275274 + 12666275275.

It is an arithmetic number, because the mean of its divisors is an integer number (12666275275).

Almost surely, 2^25332550549 is an apocalyptic number.

It is an amenable number.

25332550549 is a deficient number, since it is larger than the sum of its proper divisors (1).

25332550549 is an equidigital number, since it uses as much as digits as its factorization.

25332550549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810000, while the sum is 43.

The spelling of 25332550549 in words is "twenty-five billion, three hundred thirty-two million, five hundred fifty thousand, five hundred forty-nine".