1671445564 has 12 divisors (see below), whose sum is σ = 2925322344. Its totient is φ = 835639184.

The previous prime is 1671445549. The next prime is 1671445579. The reversal of 1671445564 is 4655441761.

It is an interprime number because it is at equal distance from previous prime (1671445549) and next prime (1671445579).

It is a self number, because there is not a number n which added to its sum of digits gives 1671445564.

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, 53562 + ... + 78814.

It is an arithmetic number, because the mean of its divisors is an integer number (243776862).

Almost surely, 2^1671445564 is an apocalyptic number.

It is an amenable number.

1671445564 is a deficient number, since it is larger than the sum of its proper divisors (1253876780).

1671445564 is a wasteful number, since it uses less digits than its factorization.

1671445564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41804 (or 41802 counting only the distinct ones).

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

The square root of 1671445564 is about 40883.3164506012. The cubic root of 1671445564 is about 1186.7632219895.

The spelling of 1671445564 in words is "one billion, six hundred seventy-one million, four hundred forty-five thousand, five hundred sixty-four".