26149153889 has 2 divisors, whose sum is σ = 26149153890. Its totient is φ = 26149153888.

The previous prime is 26149153843. The next prime is 26149153903. The reversal of 26149153889 is 98835194162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22873537600 + 3275616289 = 151240^2 + 57233^2 .

It is a cyclic number.

It is not a de Polignac number, because 26149153889 - 2⁸ = 26149153633 is a prime.

It is a super-4 number, since 4×26149153889⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (26149153189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13074576944 + 13074576945.

It is an arithmetic number, because the mean of its divisors is an integer number (13074576945).

Almost surely, 2^26149153889 is an apocalyptic number.

It is an amenable number.

26149153889 is a deficient number, since it is larger than the sum of its proper divisors (1).

26149153889 is an equidigital number, since it uses as much as digits as its factorization.

26149153889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 56.

The spelling of 26149153889 in words is "twenty-six billion, one hundred forty-nine million, one hundred fifty-three thousand, eight hundred eighty-nine".