26824778764 has 48 divisors (see below), whose sum is σ = 55505995776. Its totient is φ = 11100211200.

The previous prime is 26824778689. The next prime is 26824778789. The reversal of 26824778764 is 46787742862.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349644 + ... + 419404.

It is an arithmetic number, because the mean of its divisors is an integer number (1156374912).

Almost surely, 2^26824778764 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 26824778764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27752997888).

26824778764 is an abundant number, since it is smaller than the sum of its proper divisors (28681217012).

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

26824778764 is a wasteful number, since it uses less digits than its factorization.

26824778764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70246 (or 70244 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 61.

The spelling of 26824778764 in words is "twenty-six billion, eight hundred twenty-four million, seven hundred seventy-eight thousand, seven hundred sixty-four".