26157875552197 has 2 divisors, whose sum is σ = 26157875552198. Its totient is φ = 26157875552196.

The previous prime is 26157875552117. The next prime is 26157875552261. The reversal of 26157875552197 is 79125557875162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25608447709441 + 549427842756 = 5060479^2 + 741234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26157875552197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26157875552117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13078937776098 + 13078937776099.

It is an arithmetic number, because the mean of its divisors is an integer number (13078937776099).

Almost surely, 2^{26157875552197} is an apocalyptic number.

It is an amenable number.

26157875552197 is a deficient number, since it is larger than the sum of its proper divisors (1).

26157875552197 is an equidigital number, since it uses as much as digits as its factorization.

26157875552197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440000, while the sum is 70.

The spelling of 26157875552197 in words is "twenty-six trillion, one hundred fifty-seven billion, eight hundred seventy-five million, five hundred fifty-two thousand, one hundred ninety-seven".