25044539135797 has 2 divisors, whose sum is σ = 25044539135798. Its totient is φ = 25044539135796.

The previous prime is 25044539135783. The next prime is 25044539135873. The reversal of 25044539135797 is 79753193544052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13331655772516 + 11712883363281 = 3651254^2 + 3422409^2 .

It is a cyclic number.

It is not a de Polignac number, because 25044539135797 - 2¹¹ = 25044539133749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25044539135747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12522269567898 + 12522269567899.

It is an arithmetic number, because the mean of its divisors is an integer number (12522269567899).

Almost surely, 2^{25044539135797} is an apocalyptic number.

It is an amenable number.

25044539135797 is a deficient number, since it is larger than the sum of its proper divisors (1).

25044539135797 is an equidigital number, since it uses as much as digits as its factorization.

25044539135797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884000, while the sum is 64.

The spelling of 25044539135797 in words is "twenty-five trillion, forty-four billion, five hundred thirty-nine million, one hundred thirty-five thousand, seven hundred ninety-seven".