26939449467840 has 896 divisors, whose sum is σ = 106406489548800. Its totient is φ = 5622820503552.

The previous prime is 26939449467811. The next prime is 26939449467913. The reversal of 26939449467840 is 4876494493962.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5794673836 + ... + 5794678484.

It is an arithmetic number, because the mean of its divisors is an integer number (118757242800).

Almost surely, 2^{26939449467840} is an apocalyptic number.

26939449467840 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 26939449467840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53203244774400).

26939449467840 is an abundant number, since it is smaller than the sum of its proper divisors (79467040080960).

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

26939449467840 is a wasteful number, since it uses less digits than its factorization.

26939449467840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5389 (or 5379 counting only the distinct ones).

The product of its (nonzero) digits is 2257403904, while the sum is 75.

The spelling of 26939449467840 in words is "twenty-six trillion, nine hundred thirty-nine billion, four hundred forty-nine million, four hundred sixty-seven thousand, eight hundred forty".