26681894544 has 80 divisors (see below), whose sum is σ = 70054034112. Its totient is φ = 8749069824.

The previous prime is 26681894509. The next prime is 26681894549. The reversal of 26681894544 is 44549818662.

It is not an unprimeable number, because it can be changed into a prime (26681894549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2480602 + ... + 2491334.

Almost surely, 2^26681894544 is an apocalyptic number.

26681894544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26681894544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35027017056).

26681894544 is an abundant number, since it is smaller than the sum of its proper divisors (43372139568).

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

26681894544 is a wasteful number, since it uses less digits than its factorization.

26681894544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11584 (or 11578 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 57.

The spelling of 26681894544 in words is "twenty-six billion, six hundred eighty-one million, eight hundred ninety-four thousand, five hundred forty-four".