26139821736 has 128 divisors (see below), whose sum is σ = 77703413760. Its totient is φ = 7170508800.

The previous prime is 26139821711. The next prime is 26139821749. The reversal of 26139821736 is 63712893162.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 641656 + ... + 681176.

It is an arithmetic number, because the mean of its divisors is an integer number (607057920).

Almost surely, 2^26139821736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26139821736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38851706880).

26139821736 is an abundant number, since it is smaller than the sum of its proper divisors (51563592024).

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

26139821736 is a wasteful number, since it uses less digits than its factorization.

26139821736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39695 (or 39691 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The spelling of 26139821736 in words is "twenty-six billion, one hundred thirty-nine million, eight hundred twenty-one thousand, seven hundred thirty-six".