26400775040 has 64 divisors (see below), whose sum is σ = 63142353360. Its totient is φ = 10555625472.

The previous prime is 26400775033. The next prime is 26400775087. The reversal of 26400775040 is 4057700462.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1677287 + ... + 1692953.

Almost surely, 2^26400775040 is an apocalyptic number.

26400775040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26400775040 is an abundant number, since it is smaller than the sum of its proper divisors (36741578320).

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

26400775040 is a wasteful number, since it uses less digits than its factorization.

26400775040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18319 (or 18307 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The spelling of 26400775040 in words is "twenty-six billion, four hundred million, seven hundred seventy-five thousand, forty".