820334278164 has 24 divisors (see below), whose sum is σ = 1954839132288. Its totient is φ = 267626785600.

The previous prime is 820334278123. The next prime is 820334278171. The reversal of 820334278164 is 461872433028.

It is a congruent number.

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, 727246137 + ... + 727247264.

It is an arithmetic number, because the mean of its divisors is an integer number (81451630512).

Almost surely, 2^820334278164 is an apocalyptic number.

It is an amenable number.

820334278164 is an abundant number, since it is smaller than the sum of its proper divisors (1134504854124).

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

820334278164 is a wasteful number, since it uses less digits than its factorization.

820334278164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454493455 (or 1454493453 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 48.

The spelling of 820334278164 in words is "eight hundred twenty billion, three hundred thirty-four million, two hundred seventy-eight thousand, one hundred sixty-four".