26261126505 has 16 divisors (see below), whose sum is σ = 46686447360. Its totient is φ = 14005934064.

The previous prime is 26261126483. The next prime is 26261126513. The reversal of 26261126505 is 50562116262.

26261126505 is a `hidden beast` number, since 2 + 6 + 26 + 1 + 126 + 505 = 666.

It is not a de Polignac number, because 26261126505 - 2⁵ = 26261126473 is a prime.

It is a super-2 number, since 2×26261126505² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 26261126505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97263297 + ... + 97263566.

It is an arithmetic number, because the mean of its divisors is an integer number (2917902960).

Almost surely, 2^26261126505 is an apocalyptic number.

It is an amenable number.

26261126505 is a deficient number, since it is larger than the sum of its proper divisors (20425320855).

26261126505 is a wasteful number, since it uses less digits than its factorization.

26261126505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194526877 (or 194526871 counting only the distinct ones).

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

The spelling of 26261126505 in words is "twenty-six billion, two hundred sixty-one million, one hundred twenty-six thousand, five hundred five".