25805077553 has 2 divisors, whose sum is σ = 25805077554. Its totient is φ = 25805077552.

The previous prime is 25805077531. The next prime is 25805077559. The reversal of 25805077553 is 35577050852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22863859264 + 2941218289 = 151208^2 + 54233^2 .

It is a cyclic number.

It is not a de Polignac number, because 25805077553 - 2²² = 25800883249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25805077498 and 25805077507.

It is not a weakly prime, because it can be changed into another prime (25805077559) 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, 12902538776 + 12902538777.

It is an arithmetic number, because the mean of its divisors is an integer number (12902538777).

Almost surely, 2^25805077553 is an apocalyptic number.

It is an amenable number.

25805077553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25805077553 is an equidigital number, since it uses as much as digits as its factorization.

25805077553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470000, while the sum is 47.

The spelling of 25805077553 in words is "twenty-five billion, eight hundred five million, seventy-seven thousand, five hundred fifty-three".