821215480146 has 16 divisors (see below), whose sum is σ = 1680627029664. Its totient is φ = 267372481824.

The previous prime is 821215480097. The next prime is 821215480147. The reversal of 821215480146 is 641084512128.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 821215480098 and 821215480107.

It is not an unprimeable number, because it can be changed into a prime (821215480147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1591502611 + ... + 1591503126.

It is an arithmetic number, because the mean of its divisors is an integer number (105039189354).

Almost surely, 2^821215480146 is an apocalyptic number.

821215480146 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

821215480146 is an abundant number, since it is smaller than the sum of its proper divisors (859411549518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821215480146 is a wasteful number, since it uses less digits than its factorization.

821215480146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183005785.

The product of its (nonzero) digits is 122880, while the sum is 42.

The spelling of 821215480146 in words is "eight hundred twenty-one billion, two hundred fifteen million, four hundred eighty thousand, one hundred forty-six".