25502775553 has 2 divisors, whose sum is σ = 25502775554. Its totient is φ = 25502775552.

The previous prime is 25502775523. The next prime is 25502775581. The reversal of 25502775553 is 35557720552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22311994384 + 3190781169 = 149372^2 + 56487^2 .

It is a cyclic number.

It is not a de Polignac number, because 25502775553 - 2⁹ = 25502775041 is a prime.

It is not a weakly prime, because it can be changed into another prime (25502775523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751387776 + 12751387777.

It is an arithmetic number, because the mean of its divisors is an integer number (12751387777).

Almost surely, 2^25502775553 is an apocalyptic number.

It is an amenable number.

25502775553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25502775553 is an equidigital number, since it uses as much as digits as its factorization.

25502775553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837500, while the sum is 46.

The spelling of 25502775553 in words is "twenty-five billion, five hundred two million, seven hundred seventy-five thousand, five hundred fifty-three".