26290505505 has 48 divisors (see below), whose sum is σ = 46260889920. Its totient is φ = 12740196480.

The previous prime is 26290505443. The next prime is 26290505509. The reversal of 26290505505 is 50550509262.

It is not a de Polignac number, because 26290505505 - 2⁶ = 26290505441 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26290505509) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6421239 + ... + 6425331.

It is an arithmetic number, because the mean of its divisors is an integer number (963768540).

Almost surely, 2^26290505505 is an apocalyptic number.

It is an amenable number.

26290505505 is a deficient number, since it is larger than the sum of its proper divisors (19970384415).

26290505505 is a wasteful number, since it uses less digits than its factorization.

26290505505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662 (or 7651 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 26290505505 in words is "twenty-six billion, two hundred ninety million, five hundred five thousand, five hundred five".