1082808377821 has 8 divisors (see below), whose sum is σ = 1097890650360. Its totient is φ = 1067732842752.

The previous prime is 1082808377801. The next prime is 1082808377839. The reversal of 1082808377821 is 1287738082801.

It can be written as a sum of positive squares in 4 ways, for example, as 174715640100 + 908092737721 = 417990^2 + 952939^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1082808377821 - 2⁵ = 1082808377789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1082808377801) 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, 1360270 + ... + 2003983.

It is an arithmetic number, because the mean of its divisors is an integer number (137236331295).

Almost surely, 2^{1082808377821} is an apocalyptic number.

It is an amenable number.

1082808377821 is a deficient number, since it is larger than the sum of its proper divisors (15082272539).

1082808377821 is an equidigital number, since it uses as much as digits as its factorization.

1082808377821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368735.

The product of its (nonzero) digits is 2408448, while the sum is 55.

The spelling of 1082808377821 in words is "one trillion, eighty-two billion, eight hundred eight million, three hundred seventy-seven thousand, eight hundred twenty-one".