17672257420445 has 8 divisors (see below), whose sum is σ = 21206781611736. Its totient is φ = 14137757464896.

The previous prime is 17672257420439. The next prime is 17672257420459. The reversal of 17672257420445 is 54402475227671.

It can be written as a sum of positive squares in 4 ways, for example, as 1882927351204 + 15789330069241 = 1372198^2 + 3973579^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 17672257420445 - 2¹⁸ = 17672257158301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4414142 + ... + 7404671.

It is an arithmetic number, because the mean of its divisors is an integer number (2650847701467).

Almost surely, 2^{17672257420445} is an apocalyptic number.

It is an amenable number.

17672257420445 is a deficient number, since it is larger than the sum of its proper divisors (3534524191291).

17672257420445 is a wasteful number, since it uses less digits than its factorization.

17672257420445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12117871.

The product of its (nonzero) digits is 26342400, while the sum is 56.

The spelling of 17672257420445 in words is "seventeen trillion, six hundred seventy-two billion, two hundred fifty-seven million, four hundred twenty thousand, four hundred forty-five".