1672619716805 has 8 divisors (see below), whose sum is σ = 2007160298232. Its totient is φ = 1338084681408.

The previous prime is 1672619716741. The next prime is 1672619716813. The reversal of 1672619716805 is 5086179162761.

It is a happy number.

It is a Cunningham number, because it is equal to 1293298²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 1672619716804 = 1^2 + 1293298^2 .

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 1672619716805 - 2⁶ = 1672619716741 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691322 + ... + 1955291.

It is an arithmetic number, because the mean of its divisors is an integer number (250895037279).

Almost surely, 2^{1672619716805} is an apocalyptic number.

It is an amenable number.

1672619716805 is a deficient number, since it is larger than the sum of its proper divisors (334540581427).

1672619716805 is a wasteful number, since it uses less digits than its factorization.

1672619716805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773015.

The product of its (nonzero) digits is 7620480, while the sum is 59.

The spelling of 1672619716805 in words is "one trillion, six hundred seventy-two billion, six hundred nineteen million, seven hundred sixteen thousand, eight hundred five".