25508257553 has 2 divisors, whose sum is σ = 25508257554. Its totient is φ = 25508257552.

The previous prime is 25508257531. The next prime is 25508257613. The reversal of 25508257553 is 35575280552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25469606464 + 38651089 = 159592^2 + 6217^2 .

It is a cyclic number.

It is not a de Polignac number, because 25508257553 - 2¹⁴ = 25508241169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25508257498 and 25508257507.

It is not a weakly prime, because it can be changed into another prime (25508257153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12754128776 + 12754128777.

It is an arithmetic number, because the mean of its divisors is an integer number (12754128777).

Almost surely, 2^25508257553 is an apocalyptic number.

It is an amenable number.

25508257553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25508257553 is an equidigital number, since it uses as much as digits as its factorization.

25508257553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100000, while the sum is 47.

The spelling of 25508257553 in words is "twenty-five billion, five hundred eight million, two hundred fifty-seven thousand, five hundred fifty-three".