26557166159 has 2 divisors, whose sum is σ = 26557166160. Its totient is φ = 26557166158.

The previous prime is 26557166107. The next prime is 26557166197. The reversal of 26557166159 is 95166175562.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26557166159 - 2¹⁶ = 26557100623 is a prime.

It is a super-3 number, since 3×26557166159³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26557166159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26557166359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13278583079 + 13278583080.

It is an arithmetic number, because the mean of its divisors is an integer number (13278583080).

Almost surely, 2^26557166159 is an apocalyptic number.

26557166159 is a deficient number, since it is larger than the sum of its proper divisors (1).

26557166159 is an equidigital number, since it uses as much as digits as its factorization.

26557166159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402000, while the sum is 53.

The spelling of 26557166159 in words is "twenty-six billion, five hundred fifty-seven million, one hundred sixty-six thousand, one hundred fifty-nine".