25428043633 has 2 divisors, whose sum is σ = 25428043634. Its totient is φ = 25428043632.

The previous prime is 25428043631. The next prime is 25428043657. The reversal of 25428043633 is 33634082452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25232687104 + 195356529 = 158848^2 + 13977^2 .

It is a cyclic number.

It is not a de Polignac number, because 25428043633 - 2¹ = 25428043631 is a prime.

Together with 25428043631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25428043631) 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, 12714021816 + 12714021817.

It is an arithmetic number, because the mean of its divisors is an integer number (12714021817).

Almost surely, 2^25428043633 is an apocalyptic number.

It is an amenable number.

25428043633 is a deficient number, since it is larger than the sum of its proper divisors (1).

25428043633 is an equidigital number, since it uses as much as digits as its factorization.

25428043633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 25428043633 in words is "twenty-five billion, four hundred twenty-eight million, forty-three thousand, six hundred thirty-three".