105605099978 has 24 divisors (see below), whose sum is σ = 192281872032. Its totient is φ = 43291530744.

The previous prime is 105605099933. The next prime is 105605100011. The reversal of 105605099978 is 879990506501.

It is a super-2 number, since 2×105605099978² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 23423900 + ... + 23428407.

It is an arithmetic number, because the mean of its divisors is an integer number (8011744668).

Almost surely, 2^105605099978 is an apocalyptic number.

105605099978 is a deficient number, since it is larger than the sum of its proper divisors (86676772054).

105605099978 is a wasteful number, since it uses less digits than its factorization.

105605099978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46852346 (or 46852339 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 59.

The spelling of 105605099978 in words is "one hundred five billion, six hundred five million, ninety-nine thousand, nine hundred seventy-eight".