25263203401 has 2 divisors, whose sum is σ = 25263203402. Its totient is φ = 25263203400.

The previous prime is 25263203369. The next prime is 25263203419. The reversal of 25263203401 is 10430236252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22649949001 + 2613254400 = 150499^2 + 51120^2 .

It is a cyclic number.

It is not a de Polignac number, because 25263203401 - 2⁵ = 25263203369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25263203401.

It is not a weakly prime, because it can be changed into another prime (25263203431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12631601700 + 12631601701.

It is an arithmetic number, because the mean of its divisors is an integer number (12631601701).

Almost surely, 2^25263203401 is an apocalyptic number.

It is an amenable number.

25263203401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25263203401 is an equidigital number, since it uses as much as digits as its factorization.

25263203401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 25263203401 its reverse (10430236252), we get a palindrome (35693439653).

The spelling of 25263203401 in words is "twenty-five billion, two hundred sixty-three million, two hundred three thousand, four hundred one".