25250074780561 has 2 divisors, whose sum is σ = 25250074780562. Its totient is φ = 25250074780560.

The previous prime is 25250074780459. The next prime is 25250074780583. The reversal of 25250074780561 is 16508747005252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24976315612161 + 273759168400 = 4997631^2 + 523220^2 .

It is a cyclic number.

It is not a de Polignac number, because 25250074780561 - 2⁴¹ = 23051051525009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25250074780499 and 25250074780508.

It is not a weakly prime, because it can be changed into another prime (25250074780261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12625037390280 + 12625037390281.

It is an arithmetic number, because the mean of its divisors is an integer number (12625037390281).

Almost surely, 2^{25250074780561} is an apocalyptic number.

It is an amenable number.

25250074780561 is a deficient number, since it is larger than the sum of its proper divisors (1).

25250074780561 is an equidigital number, since it uses as much as digits as its factorization.

25250074780561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704000, while the sum is 52.

The spelling of 25250074780561 in words is "twenty-five trillion, two hundred fifty billion, seventy-four million, seven hundred eighty thousand, five hundred sixty-one".