1671647612 has 6 divisors (see below), whose sum is σ = 2925383328. Its totient is φ = 835823804.

The previous prime is 1671647603. The next prime is 1671647623. The reversal of 1671647612 is 2167461761.

It is a self number, because there is not a number n which added to its sum of digits gives 1671647612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208955948 + ... + 208955955.

It is an arithmetic number, because the mean of its divisors is an integer number (487563888).

Almost surely, 2^1671647612 is an apocalyptic number.

It is an amenable number.

1671647612 is a deficient number, since it is larger than the sum of its proper divisors (1253735716).

1671647612 is a wasteful number, since it uses less digits than its factorization.

1671647612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417911907 (or 417911905 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 1671647612 is about 40885.7874083403. The cubic root of 1671647612 is about 1186.8110395752.

The spelling of 1671647612 in words is "one billion, six hundred seventy-one million, six hundred forty-seven thousand, six hundred twelve".