25950781523 has 2 divisors, whose sum is σ = 25950781524. Its totient is φ = 25950781522.

The previous prime is 25950781513. The next prime is 25950781541. The reversal of 25950781523 is 32518705952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25950781523 - 2⁶ = 25950781459 is a prime.

It is not a weakly prime, because it can be changed into another prime (25950781513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12975390761 + 12975390762.

It is an arithmetic number, because the mean of its divisors is an integer number (12975390762).

Almost surely, 2^25950781523 is an apocalyptic number.

25950781523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25950781523 is an equidigital number, since it uses as much as digits as its factorization.

25950781523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 25950781523 in words is "twenty-five billion, nine hundred fifty million, seven hundred eighty-one thousand, five hundred twenty-three".