25564451383 has 2 divisors, whose sum is σ = 25564451384. Its totient is φ = 25564451382.

The previous prime is 25564451293. The next prime is 25564451431. The reversal of 25564451383 is 38315446552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25564451383 - 2⁹ = 25564450871 is a prime.

It is a super-2 number, since 2×25564451383² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25564451083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12782225691 + 12782225692.

It is an arithmetic number, because the mean of its divisors is an integer number (12782225692).

Almost surely, 2^25564451383 is an apocalyptic number.

25564451383 is a deficient number, since it is larger than the sum of its proper divisors (1).

25564451383 is an equidigital number, since it uses as much as digits as its factorization.

25564451383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728000, while the sum is 46.

The spelling of 25564451383 in words is "twenty-five billion, five hundred sixty-four million, four hundred fifty-one thousand, three hundred eighty-three".