25571725493 has 2 divisors, whose sum is σ = 25571725494. Its totient is φ = 25571725492.

The previous prime is 25571725483. The next prime is 25571725541. The reversal of 25571725493 is 39452717552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21690809284 + 3880916209 = 147278^2 + 62297^2 .

It is a cyclic number.

It is not a de Polignac number, because 25571725493 - 2⁶ = 25571725429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25571725483) 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, 12785862746 + 12785862747.

It is an arithmetic number, because the mean of its divisors is an integer number (12785862747).

Almost surely, 2^25571725493 is an apocalyptic number.

It is an amenable number.

25571725493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25571725493 is an equidigital number, since it uses as much as digits as its factorization.

25571725493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646000, while the sum is 50.

The spelling of 25571725493 in words is "twenty-five billion, five hundred seventy-one million, seven hundred twenty-five thousand, four hundred ninety-three".