25671173517853 has 2 divisors, whose sum is σ = 25671173517854. Its totient is φ = 25671173517852.

The previous prime is 25671173517799. The next prime is 25671173517881. The reversal of 25671173517853 is 35871537117652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14983262955684 + 10687910562169 = 3870822^2 + 3269237^2 .

It is a cyclic number.

It is not a de Polignac number, because 25671173517853 - 2²¹ = 25671171420701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25671173517791 and 25671173517800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25671173517893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12835586758926 + 12835586758927.

It is an arithmetic number, because the mean of its divisors is an integer number (12835586758927).

Almost surely, 2^{25671173517853} is an apocalyptic number.

It is an amenable number.

25671173517853 is a deficient number, since it is larger than the sum of its proper divisors (1).

25671173517853 is an equidigital number, since it uses as much as digits as its factorization.

25671173517853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044000, while the sum is 61.

The spelling of 25671173517853 in words is "twenty-five trillion, six hundred seventy-one billion, one hundred seventy-three million, five hundred seventeen thousand, eight hundred fifty-three".