26138766786 has 48 divisors (see below), whose sum is σ = 57538034400. Its totient is φ = 7910369280.

The previous prime is 26138766779. The next prime is 26138766791. The reversal of 26138766786 is 68766783162.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 534885 + ... + 581703.

It is an arithmetic number, because the mean of its divisors is an integer number (1198709050).

Almost surely, 2^26138766786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26138766786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28769017200).

26138766786 is an abundant number, since it is smaller than the sum of its proper divisors (31399267614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26138766786 is a wasteful number, since it uses less digits than its factorization.

26138766786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47615 (or 47604 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 60.

The spelling of 26138766786 in words is "twenty-six billion, one hundred thirty-eight million, seven hundred sixty-six thousand, seven hundred eighty-six".