17961968808 has 128 divisors (see below), whose sum is σ = 58186080000. Its totient is φ = 5131969920.

The previous prime is 17961968807. The next prime is 17961968821. The reversal of 17961968808 is 80886916971.

17961968808 is a `hidden beast` number, since 1 + 7 + 9 + 619 + 6 + 8 + 8 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (17961968807) 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 31 ways as a sum of consecutive naturals, for example, 47133 + ... + 195308.

It is an arithmetic number, because the mean of its divisors is an integer number (454578750).

Almost surely, 2^17961968808 is an apocalyptic number.

17961968808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

17961968808 is an abundant number, since it is smaller than the sum of its proper divisors (40224111192).

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

17961968808 is a wasteful number, since it uses less digits than its factorization.

17961968808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242477 (or 242453 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 63.

The spelling of 17961968808 in words is "seventeen billion, nine hundred sixty-one million, nine hundred sixty-eight thousand, eight hundred eight".