673618603388161 has 8 divisors (see below), whose sum is σ = 674198424461864. Its totient is φ = 673038813830400.

The previous prime is 673618603388149. The next prime is 673618603388167. The reversal of 673618603388161 is 161883306816376.

It can be written as a sum of positive squares in 4 ways, for example, as 3614162199025 + 670004441189136 = 1901095^2 + 25884444^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673618603388161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673618603388167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34987531 + ... + 50708623.

It is an arithmetic number, because the mean of its divisors is an integer number (84274803057733).

Almost surely, 2^{673618603388161} is an apocalyptic number.

It is an amenable number.

673618603388161 is a deficient number, since it is larger than the sum of its proper divisors (579821073703).

673618603388161 is a wasteful number, since it uses less digits than its factorization.

673618603388161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15757971.

The product of its (nonzero) digits is 125411328, while the sum is 67.

The spelling of 673618603388161 in words is "six hundred seventy-three trillion, six hundred eighteen billion, six hundred three million, three hundred eighty-eight thousand, one hundred sixty-one".