1680818811 has 8 divisors (see below), whose sum is σ = 2561247744. Its totient is φ = 960467880.

The previous prime is 1680818803. The next prime is 1680818837. The reversal of 1680818811 is 1188180861.

1680818811 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1680818811 - 2³ = 1680818803 is a prime.

It is a super-2 number, since 2×1680818811² = 5650303750822907442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1680818851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40019475 + ... + 40019516.

It is an arithmetic number, because the mean of its divisors is an integer number (320155968).

Almost surely, 2^1680818811 is an apocalyptic number.

1680818811 is a deficient number, since it is larger than the sum of its proper divisors (880428933).

1680818811 is an equidigital number, since it uses as much as digits as its factorization.

1680818811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80039001.

The product of its (nonzero) digits is 24576, while the sum is 42.

The square root of 1680818811 is about 40997.7903185038. The cubic root of 1680818811 is about 1188.9774920683.

The spelling of 1680818811 in words is "one billion, six hundred eighty million, eight hundred eighteen thousand, eight hundred eleven".