26849785872 has 160 divisors (see below), whose sum is σ = 85587022080. Its totient is φ = 7063142400.

The previous prime is 26849785867. The next prime is 26849785883. The reversal of 26849785872 is 27858794862.

It is a super-2 number, since 2×26849785872² (a number of 22 digits) contains 22 as substring.

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, 1743904 + ... + 1759232.

It is an arithmetic number, because the mean of its divisors is an integer number (534918888).

Almost surely, 2^26849785872 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 26849785872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42793511040).

26849785872 is an abundant number, since it is smaller than the sum of its proper divisors (58737236208).

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

26849785872 is a wasteful number, since it uses less digits than its factorization.

26849785872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15761 (or 15755 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 66.

The spelling of 26849785872 in words is "twenty-six billion, eight hundred forty-nine million, seven hundred eighty-five thousand, eight hundred seventy-two".