26808601985 has 8 divisors (see below), whose sum is σ = 35094897216. Its totient is φ = 19497165040.

The previous prime is 26808601957. The next prime is 26808602011. The reversal of 26808601985 is 58910680862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26808601985 - 2¹⁰ = 26808600961 is a prime.

It is a super-2 number, since 2×26808601985² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 243714509 + ... + 243714618.

It is an arithmetic number, because the mean of its divisors is an integer number (4386862152).

Almost surely, 2^26808601985 is an apocalyptic number.

It is an amenable number.

26808601985 is a deficient number, since it is larger than the sum of its proper divisors (8286295231).

26808601985 is a wasteful number, since it uses less digits than its factorization.

26808601985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487429143.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 26808601985 in words is "twenty-six billion, eight hundred eight million, six hundred one thousand, nine hundred eighty-five".