26819304688 has 80 divisors (see below), whose sum is σ = 60939671040. Its totient is φ = 11303193600.

The previous prime is 26819304683. The next prime is 26819304739. The reversal of 26819304688 is 88640391862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26819304683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71848 + ... + 242488.

It is an arithmetic number, because the mean of its divisors is an integer number (761745888).

Almost surely, 2^26819304688 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 26819304688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30469835520).

26819304688 is an abundant number, since it is smaller than the sum of its proper divisors (34120366352).

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

26819304688 is a wasteful number, since it uses less digits than its factorization.

26819304688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170726 (or 170720 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 26819304688 in words is "twenty-six billion, eight hundred nineteen million, three hundred four thousand, six hundred eighty-eight".