25261920271097 has 4 divisors (see below), whose sum is σ = 25261970333796. Its totient is φ = 25261870208400.

The previous prime is 25261920271079. The next prime is 25261920271123. The reversal of 25261920271097 is 79017202916252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13485794634601 + 11776125636496 = 3672301^2 + 3431636^2 .

It is a cyclic number.

It is not a de Polignac number, because 25261920271097 - 2¹⁴ = 25261920254713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25261920271057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24266654 + ... + 25286247.

It is an arithmetic number, because the mean of its divisors is an integer number (6315492583449).

Almost surely, 2^{25261920271097} is an apocalyptic number.

It is an amenable number.

25261920271097 is a deficient number, since it is larger than the sum of its proper divisors (50062699).

25261920271097 is an equidigital number, since it uses as much as digits as its factorization.

25261920271097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50062698.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 25261920271097 in words is "twenty-five trillion, two hundred sixty-one billion, nine hundred twenty million, two hundred seventy-one thousand, ninety-seven".