25455644655437 has 2 divisors, whose sum is σ = 25455644655438. Its totient is φ = 25455644655436.

The previous prime is 25455644655401. The next prime is 25455644655457. The reversal of 25455644655437 is 73455644655452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18215772784036 + 7239871871401 = 4267994^2 + 2690701^2 .

It is a cyclic number.

It is not a de Polignac number, because 25455644655437 - 2⁶ = 25455644655373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25455644655457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12727822327718 + 12727822327719.

It is an arithmetic number, because the mean of its divisors is an integer number (12727822327719).

Almost surely, 2^{25455644655437} is an apocalyptic number.

It is an amenable number.

25455644655437 is a deficient number, since it is larger than the sum of its proper divisors (1).

25455644655437 is an equidigital number, since it uses as much as digits as its factorization.

25455644655437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600000, while the sum is 65.

The spelling of 25455644655437 in words is "twenty-five trillion, four hundred fifty-five billion, six hundred forty-four million, six hundred fifty-five thousand, four hundred thirty-seven".