26685383409 has 24 divisors (see below), whose sum is σ = 38651733120. Its totient is φ = 17741325888.

The previous prime is 26685383407. The next prime is 26685383419. The reversal of 26685383409 is 90438358662.

26685383409 is a `hidden beast` number, since 2 + 6 + 68 + 538 + 3 + 40 + 9 = 666.

It is not a de Polignac number, because 26685383409 - 2¹ = 26685383407 is a prime.

It is a super-2 number, since 2×26685383409² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26685383407) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5604972 + ... + 5609730.

It is an arithmetic number, because the mean of its divisors is an integer number (1610488880).

Almost surely, 2^26685383409 is an apocalyptic number.

It is an amenable number.

26685383409 is a deficient number, since it is larger than the sum of its proper divisors (11966349711).

26685383409 is a wasteful number, since it uses less digits than its factorization.

26685383409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349 (or 6346 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 26685383409 in words is "twenty-six billion, six hundred eighty-five million, three hundred eighty-three thousand, four hundred nine".