1681448996 has 12 divisors (see below), whose sum is σ = 2946798960. Its totient is φ = 839506440.

The previous prime is 1681448987. The next prime is 1681449037. The reversal of 1681448996 is 6998441861.

It is a super-2 number, since 2×1681448996² = 5654541452298816032, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301406 + ... + 306933.

It is an arithmetic number, because the mean of its divisors is an integer number (245566580).

Almost surely, 2^1681448996 is an apocalyptic number.

It is an amenable number.

1681448996 is a deficient number, since it is larger than the sum of its proper divisors (1265349964).

1681448996 is a wasteful number, since it uses less digits than its factorization.

1681448996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609034 (or 609032 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 56.

The square root of 1681448996 is about 41005.4751953931. The cubic root of 1681448996 is about 1189.1260669086.

The spelling of 1681448996 in words is "one billion, six hundred eighty-one million, four hundred forty-eight thousand, nine hundred ninety-six".