1671201646 has 8 divisors (see below), whose sum is σ = 2508020280. Its totient is φ = 835194888.

The previous prime is 1671201617. The next prime is 1671201659. The reversal of 1671201646 is 6461021761.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197796 + ... + 206071.

It is an arithmetic number, because the mean of its divisors is an integer number (313502535).

Almost surely, 2^1671201646 is an apocalyptic number.

1671201646 is a deficient number, since it is larger than the sum of its proper divisors (836818634).

1671201646 is a wasteful number, since it uses less digits than its factorization.

1671201646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405938.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1671201646 is about 40880.3332422817. Note that the first 3 decimals coincide. The cubic root of 1671201646 is about 1186.7054901275.

The spelling of 1671201646 in words is "one billion, six hundred seventy-one million, two hundred one thousand, six hundred forty-six".