1681952210 has 8 divisors (see below), whose sum is σ = 3027513996. Its totient is φ = 672780880.

The previous prime is 1681952203. The next prime is 1681952221. The reversal of 1681952210 is 122591861.

It can be written as a sum of positive squares in 2 ways, for example, as 1609855129 + 72097081 = 40123^2 + 8491^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 84097601 + ... + 84097620.

Almost surely, 2^1681952210 is an apocalyptic number.

1681952210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1681952210 is a deficient number, since it is larger than the sum of its proper divisors (1345561786).

1681952210 is a wasteful number, since it uses less digits than its factorization.

1681952210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168195228.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 1681952210 is about 41011.6106730765. The cubic root of 1681952210 is about 1189.2446799228.

The spelling of 1681952210 in words is "one billion, six hundred eighty-one million, nine hundred fifty-two thousand, two hundred ten".