26405005065 has 8 divisors (see below), whose sum is σ = 42248008128. Its totient is φ = 14082669360.

The previous prime is 26405005063. The next prime is 26405005073. The reversal of 26405005065 is 56050050462.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26405005065 - 2¹ = 26405005063 is a prime.

It is a super-3 number, since 3×26405005065³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (26405005061) 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 in 7 ways as a sum of consecutive naturals, for example, 880166821 + ... + 880166850.

It is an arithmetic number, because the mean of its divisors is an integer number (5281001016).

Almost surely, 2^26405005065 is an apocalyptic number.

It is an amenable number.

26405005065 is a deficient number, since it is larger than the sum of its proper divisors (15843003063).

26405005065 is a wasteful number, since it uses less digits than its factorization.

26405005065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760333679.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 26405005065 in words is "twenty-six billion, four hundred five million, five thousand, sixty-five".