1673644165636 has 27 divisors (see below), whose sum is σ = 2946693173781. Its totient is φ = 831762445584.

The previous prime is 1673644165631. The next prime is 1673644165637. The reversal of 1673644165636 is 6365614463761.

The square root of 1673644165636 is 1293694.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1522435176900 + 151208988736 = 1233870^2 + 388856^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1673644165631) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 447616255 + ... + 447619993.

Almost surely, 2^{1673644165636} is an apocalyptic number.

1673644165636 is the 1293694-th square number.

It is an amenable number.

1673644165636 is a deficient number, since it is larger than the sum of its proper divisors (1273049008145).

1673644165636 is an frugal number, since it uses more digits than its factorization.

1673644165636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7828 (or 3914 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 58.

The spelling of 1673644165636 in words is "one trillion, six hundred seventy-three billion, six hundred forty-four million, one hundred sixty-five thousand, six hundred thirty-six".