25543744253 has 2 divisors, whose sum is σ = 25543744254. Its totient is φ = 25543744252.

The previous prime is 25543744217. The next prime is 25543744297. The reversal of 25543744253 is 35244734552.

It is an a-pointer prime, because the next prime (25543744297) can be obtained adding 25543744253 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23802935524 + 1740808729 = 154282^2 + 41723^2 .

It is a cyclic number.

It is not a de Polignac number, because 25543744253 - 2¹⁸ = 25543482109 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25543744453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12771872126 + 12771872127.

It is an arithmetic number, because the mean of its divisors is an integer number (12771872127).

Almost surely, 2^25543744253 is an apocalyptic number.

It is an amenable number.

25543744253 is a deficient number, since it is larger than the sum of its proper divisors (1).

25543744253 is an equidigital number, since it uses as much as digits as its factorization.

25543744253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016000, while the sum is 44.

The spelling of 25543744253 in words is "twenty-five billion, five hundred forty-three million, seven hundred forty-four thousand, two hundred fifty-three".