26841561815440 has 80 divisors (see below), whose sum is σ = 65751296558400. Its totient is φ = 10162232510976.

The previous prime is 26841561815423. The next prime is 26841561815447. The reversal of 26841561815440 is 4451816514862.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (26841561815447) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6416830 + ... + 9739549.

It is an arithmetic number, because the mean of its divisors is an integer number (821891206980).

Almost surely, 2^{26841561815440} is an apocalyptic number.

26841561815440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26841561815440 is an abundant number, since it is smaller than the sum of its proper divisors (38909734742960).

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

26841561815440 is a wasteful number, since it uses less digits than its factorization.

26841561815440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16157504 (or 16157498 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 55.

The spelling of 26841561815440 in words is "twenty-six trillion, eight hundred forty-one billion, five hundred sixty-one million, eight hundred fifteen thousand, four hundred forty".