25705559923 has 2 divisors, whose sum is σ = 25705559924. Its totient is φ = 25705559922.

The previous prime is 25705559911. The next prime is 25705559953. The reversal of 25705559923 is 32995550752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25705559923 - 2¹³ = 25705551731 is a prime.

It is not a weakly prime, because it can be changed into another prime (25705559953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12852779961 + 12852779962.

It is an arithmetic number, because the mean of its divisors is an integer number (12852779962).

Almost surely, 2^25705559923 is an apocalyptic number.

25705559923 is a deficient number, since it is larger than the sum of its proper divisors (1).

25705559923 is an equidigital number, since it uses as much as digits as its factorization.

25705559923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4252500, while the sum is 52.

The spelling of 25705559923 in words is "twenty-five billion, seven hundred five million, five hundred fifty-nine thousand, nine hundred twenty-three".