26995170157 has 2 divisors, whose sum is σ = 26995170158. Its totient is φ = 26995170156.

The previous prime is 26995170133. The next prime is 26995170161. The reversal of 26995170157 is 75107159962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14411042116 + 12584128041 = 120046^2 + 112179^2 .

It is a cyclic number.

It is not a de Polignac number, because 26995170157 - 2⁷ = 26995170029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26995170197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13497585078 + 13497585079.

It is an arithmetic number, because the mean of its divisors is an integer number (13497585079).

Almost surely, 2^26995170157 is an apocalyptic number.

It is an amenable number.

26995170157 is a deficient number, since it is larger than the sum of its proper divisors (1).

26995170157 is an equidigital number, since it uses as much as digits as its factorization.

26995170157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1190700, while the sum is 52.

The spelling of 26995170157 in words is "twenty-six billion, nine hundred ninety-five million, one hundred seventy thousand, one hundred fifty-seven".