26041051665 has 20 divisors (see below), whose sum is σ = 46680997044. Its totient is φ = 13888560672.

The previous prime is 26041051649. The next prime is 26041051667. The reversal of 26041051665 is 56615014062.

It can be written as a sum of positive squares in 2 ways, for example, as 13951389456 + 12089662209 = 118116^2 + 109953^2 .

It is not a de Polignac number, because 26041051665 - 2⁴ = 26041051649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26041051667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32149042 + ... + 32149851.

Almost surely, 2^26041051665 is an apocalyptic number.

It is an amenable number.

26041051665 is a deficient number, since it is larger than the sum of its proper divisors (20639945379).

26041051665 is an equidigital number, since it uses as much as digits as its factorization.

26041051665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64298910 (or 64298901 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 26041051665 in words is "twenty-six billion, forty-one million, fifty-one thousand, six hundred sixty-five".