1821716146 has 16 divisors (see below), whose sum is σ = 2792952576. Its totient is φ = 890763136.

The previous prime is 1821716129. The next prime is 1821716153. The reversal of 1821716146 is 6416171281.

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, 121410 + ... + 135586.

It is an arithmetic number, because the mean of its divisors is an integer number (174559536).

Almost surely, 2^1821716146 is an apocalyptic number.

1821716146 is a deficient number, since it is larger than the sum of its proper divisors (971236430).

1821716146 is a wasteful number, since it uses less digits than its factorization.

1821716146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15593.

The product of its digits is 16128, while the sum is 37.

The square root of 1821716146 is about 42681.5668175385. The cubic root of 1821716146 is about 1221.3127824290.

The spelling of 1821716146 in words is "one billion, eight hundred twenty-one million, seven hundred sixteen thousand, one hundred forty-six".