1673205605 has 16 divisors (see below), whose sum is σ = 2081652480. Its totient is φ = 1289563968.

The previous prime is 1673205581. The next prime is 1673205617. The reversal of 1673205605 is 5065023761.

It is a cyclic number.

It is not a de Polignac number, because 1673205605 - 2²⁰ = 1672157029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54674 + ... + 79596.

It is an arithmetic number, because the mean of its divisors is an integer number (130103280).

Almost surely, 2^1673205605 is an apocalyptic number.

It is an amenable number.

1673205605 is a deficient number, since it is larger than the sum of its proper divisors (408446875).

1673205605 is a wasteful number, since it uses less digits than its factorization.

1673205605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25420.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 1673205605 is about 40904.8359610450. The cubic root of 1673205605 is about 1187.1796318417.

The spelling of 1673205605 in words is "one billion, six hundred seventy-three million, two hundred five thousand, six hundred five".