25865152035817 has 2 divisors, whose sum is σ = 25865152035818. Its totient is φ = 25865152035816.

The previous prime is 25865152035809. The next prime is 25865152035923. The reversal of 25865152035817 is 71853025156852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25484616036441 + 380535999376 = 5048229^2 + 616876^2 .

It is a cyclic number.

It is not a de Polignac number, because 25865152035817 - 2³ = 25865152035809 is a prime.

It is not a weakly prime, because it can be changed into another prime (25865152015817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12932576017908 + 12932576017909.

It is an arithmetic number, because the mean of its divisors is an integer number (12932576017909).

Almost surely, 2^{25865152035817} is an apocalyptic number.

It is an amenable number.

25865152035817 is a deficient number, since it is larger than the sum of its proper divisors (1).

25865152035817 is an equidigital number, since it uses as much as digits as its factorization.

25865152035817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160000, while the sum is 58.

The spelling of 25865152035817 in words is "twenty-five trillion, eight hundred sixty-five billion, one hundred fifty-two million, thirty-five thousand, eight hundred seventeen".