26815051844 has 72 divisors (see below), whose sum is σ = 55363069440. Its totient is φ = 11329403904.

The previous prime is 26815051841. The next prime is 26815051853. The reversal of 26815051844 is 44815051862.

It is a junction number, because it is equal to n+sod(n) for n = 26815051795 and 26815051804.

It is not an unprimeable number, because it can be changed into a prime (26815051841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18843317 + ... + 18844739.

It is an arithmetic number, because the mean of its divisors is an integer number (768931520).

Almost surely, 2^26815051844 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 26815051844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27681534720).

26815051844 is an abundant number, since it is smaller than the sum of its proper divisors (28548017596).

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

26815051844 is a wasteful number, since it uses less digits than its factorization.

26815051844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737 (or 2728 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 44.

The spelling of 26815051844 in words is "twenty-six billion, eight hundred fifteen million, fifty-one thousand, eight hundred forty-four".