1673405845 has 16 divisors (see below), whose sum is σ = 2110331520. Its totient is φ = 1272245184.

The previous prime is 1673405837. The next prime is 1673405891. The reversal of 1673405845 is 5485043761.

It is a cyclic number.

It is not a de Polignac number, because 1673405845 - 2³ = 1673405837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 15 ways as a sum of consecutive naturals, for example, 97225 + ... + 113134.

It is an arithmetic number, because the mean of its divisors is an integer number (131895720).

Almost surely, 2^1673405845 is an apocalyptic number.

It is an amenable number.

1673405845 is a deficient number, since it is larger than the sum of its proper divisors (436925675).

1673405845 is a wasteful number, since it uses less digits than its factorization.

1673405845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210444.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 1673405845 is about 40907.2835201752. The cubic root of 1673405845 is about 1187.2269883185.

The spelling of 1673405845 in words is "one billion, six hundred seventy-three million, four hundred five thousand, eight hundred forty-five".