26878787872 has 48 divisors (see below), whose sum is σ = 54281536344. Its totient is φ = 13093888000.

The previous prime is 26878787869. The next prime is 26878787891. The reversal of 26878787872 is 27878787862.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16262370576 + 10616417296 = 127524^2 + 103036^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984972 + ... + 1011892.

Almost surely, 2^26878787872 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 26878787872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27140768172).

26878787872 is an abundant number, since it is smaller than the sum of its proper divisors (27402748472).

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

26878787872 is a wasteful number, since it uses less digits than its factorization.

26878787872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27733 (or 27725 counting only the distinct ones).

The product of its digits is 236027904, while the sum is 70.

The spelling of 26878787872 in words is "twenty-six billion, eight hundred seventy-eight million, seven hundred eighty-seven thousand, eight hundred seventy-two".