1673118967081 has 3 divisors (see below), whose sum is σ = 1673120260573. Its totient is φ = 1673117673590.

The previous prime is 1673118967063. The next prime is 1673118967097. The reversal of 1673118967081 is 1807698113761.

It is a happy number.

The square root of 1673118967081 is 1293491.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-1673118967081 is a prime.

It is a super-2 number, since 2×1673118967081² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1673118967031) 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 2 ways as a sum of consecutive naturals, for example, 646746 + ... + 1940236.

Almost surely, 2^{1673118967081} is an apocalyptic number.

1673118967081 is the 1293491-st square number.

1673118967081 is the 646746-th centered octagonal number.

It is an amenable number.

1673118967081 is a deficient number, since it is larger than the sum of its proper divisors (1293492).

1673118967081 is an frugal number, since it uses more digits than its factorization.

1673118967081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586982 (or 1293491 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 58.

The spelling of 1673118967081 in words is "one trillion, six hundred seventy-three billion, one hundred eighteen million, nine hundred sixty-seven thousand, eighty-one".