25243463501 has 2 divisors, whose sum is σ = 25243463502. Its totient is φ = 25243463500.

The previous prime is 25243463491. The next prime is 25243463503. The reversal of 25243463501 is 10536434252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25050975625 + 192487876 = 158275^2 + 13874^2 .

It is a cyclic number.

It is not a de Polignac number, because 25243463501 - 2¹⁰ = 25243462477 is a prime.

Together with 25243463503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25243463503) 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 as a sum of consecutive naturals, namely, 12621731750 + 12621731751.

It is an arithmetic number, because the mean of its divisors is an integer number (12621731751).

Almost surely, 2^25243463501 is an apocalyptic number.

It is an amenable number.

25243463501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25243463501 is an equidigital number, since it uses as much as digits as its factorization.

25243463501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 25243463501 its reverse (10536434252), we get a palindrome (35779897753).

The spelling of 25243463501 in words is "twenty-five billion, two hundred forty-three million, four hundred sixty-three thousand, five hundred one".