26155385541891 has 16 divisors (see below), whose sum is σ = 39795982007200. Its totient is φ = 16965655485984.

The previous prime is 26155385541877. The next prime is 26155385541907. The reversal of 26155385541891 is 19814558355162.

26155385541891 is a `hidden beast` number, since 2 + 6 + 1 + 5 + 5 + 3 + 8 + 5 + 541 + 89 + 1 = 666.

It is not a de Polignac number, because 26155385541891 - 2⁹ = 26155385541379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26155385541841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13090782556 + ... + 13090784553.

It is an arithmetic number, because the mean of its divisors is an integer number (2487248875450).

Almost surely, 2^{26155385541891} is an apocalyptic number.

26155385541891 is a deficient number, since it is larger than the sum of its proper divisors (13640596465309).

26155385541891 is a wasteful number, since it uses less digits than its factorization.

26155385541891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26181567155 (or 26181567149 counting only the distinct ones).

The product of its digits is 51840000, while the sum is 63.

The spelling of 26155385541891 in words is "twenty-six trillion, one hundred fifty-five billion, three hundred eighty-five million, five hundred forty-one thousand, eight hundred ninety-one".