17912663444 has 12 divisors (see below), whose sum is σ = 33758481204. Its totient is φ = 8267383104.

The previous prime is 17912663407. The next prime is 17912663449. The reversal of 17912663444 is 44436621971.

It can be written as a sum of positive squares in 2 ways, for example, as 8392758544 + 9519904900 = 91612^2 + 97570^2 .

It is a super-2 number, since 2×17912663444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17912663449) 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 3 ways as a sum of consecutive naturals, for example, 172237097 + ... + 172237200.

It is an arithmetic number, because the mean of its divisors is an integer number (2813206767).

Almost surely, 2^17912663444 is an apocalyptic number.

It is an amenable number.

17912663444 is a deficient number, since it is larger than the sum of its proper divisors (15845817760).

17912663444 is a wasteful number, since it uses less digits than its factorization.

17912663444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344474314 (or 344474312 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The spelling of 17912663444 in words is "seventeen billion, nine hundred twelve million, six hundred sixty-three thousand, four hundred forty-four".