1681995316 has 24 divisors (see below), whose sum is σ = 3017851200. Its totient is φ = 819787200.

The previous prime is 1681995299. The next prime is 1681995361. The reversal of 1681995316 is 6135991861.

It is a self number, because there is not a number n which added to its sum of digits gives 1681995316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225771 + ... + 233101.

It is an arithmetic number, because the mean of its divisors is an integer number (125743800).

Almost surely, 2^1681995316 is an apocalyptic number.

It is an amenable number.

1681995316 is a deficient number, since it is larger than the sum of its proper divisors (1335855884).

1681995316 is a wasteful number, since it uses less digits than its factorization.

1681995316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8775 (or 8773 counting only the distinct ones).

The product of its digits is 349920, while the sum is 49.

The square root of 1681995316 is about 41012.1362038117. The cubic root of 1681995316 is about 1189.2548393758.

The spelling of 1681995316 in words is "one billion, six hundred eighty-one million, nine hundred ninety-five thousand, three hundred sixteen".