25656510533 has 2 divisors, whose sum is σ = 25656510534. Its totient is φ = 25656510532.

The previous prime is 25656510443. The next prime is 25656510547. The reversal of 25656510533 is 33501565652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21470161729 + 4186348804 = 146527^2 + 64702^2 .

It is a cyclic number.

It is not a de Polignac number, because 25656510533 - 2⁸ = 25656510277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25656516533) 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, 12828255266 + 12828255267.

It is an arithmetic number, because the mean of its divisors is an integer number (12828255267).

Almost surely, 2^25656510533 is an apocalyptic number.

It is an amenable number.

25656510533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25656510533 is an equidigital number, since it uses as much as digits as its factorization.

25656510533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 41.

The spelling of 25656510533 in words is "twenty-five billion, six hundred fifty-six million, five hundred ten thousand, five hundred thirty-three".