26645135506511 has 32 divisors (see below), whose sum is σ = 28190121953280. Its totient is φ = 25134962222304.

The previous prime is 26645135506489. The next prime is 26645135506531. The reversal of 26645135506511 is 11560553154662.

It is not a de Polignac number, because 26645135506511 - 2⁶ = 26645135506447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26645135506511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26645135506531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1085461940 + ... + 1085486486.

It is an arithmetic number, because the mean of its divisors is an integer number (880941311040).

Almost surely, 2^{26645135506511} is an apocalyptic number.

26645135506511 is a deficient number, since it is larger than the sum of its proper divisors (1544986446769).

26645135506511 is a wasteful number, since it uses less digits than its factorization.

26645135506511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26955.

The product of its (nonzero) digits is 3240000, while the sum is 50.

The spelling of 26645135506511 in words is "twenty-six trillion, six hundred forty-five billion, one hundred thirty-five million, five hundred six thousand, five hundred eleven".