1681868470 has 8 divisors (see below), whose sum is σ = 3027363264. Its totient is φ = 672747384.

The previous prime is 1681868437. The next prime is 1681868483. The reversal of 1681868470 is 748681861.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84093414 + ... + 84093433.

It is an arithmetic number, because the mean of its divisors is an integer number (378420408).

Almost surely, 2^1681868470 is an apocalyptic number.

1681868470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1681868470 is a deficient number, since it is larger than the sum of its proper divisors (1345494794).

1681868470 is a wasteful number, since it uses less digits than its factorization.

1681868470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168186854.

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 1681868470 is about 41010.5897299710. The cubic root of 1681868470 is about 1189.2249431348.

The spelling of 1681868470 in words is "one billion, six hundred eighty-one million, eight hundred sixty-eight thousand, four hundred seventy".