26689043920 has 320 divisors, whose sum is σ = 83833491456. Its totient is φ = 7645962240.

The previous prime is 26689043863. The next prime is 26689043957. The reversal of 26689043920 is 2934098662.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4499997 + ... + 4505923.

Almost surely, 2^26689043920 is an apocalyptic number.

26689043920 is a gapful number since it is divisible by the number (20) 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 26689043920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41916745728).

26689043920 is an abundant number, since it is smaller than the sum of its proper divisors (57144447536).

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

26689043920 is a wasteful number, since it uses less digits than its factorization.

26689043920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6018 (or 6012 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 26689043920 in words is "twenty-six billion, six hundred eighty-nine million, forty-three thousand, nine hundred twenty".