823787117620 has 48 divisors (see below), whose sum is σ = 1739620447488. Its totient is φ = 327678410880.

The previous prime is 823787117617. The next prime is 823787117633. The reversal of 823787117620 is 26711787328.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2490694 + ... + 2801986.

It is an arithmetic number, because the mean of its divisors is an integer number (36242092656).

Almost surely, 2^823787117620 is an apocalyptic number.

It is an amenable number.

823787117620 is an abundant number, since it is smaller than the sum of its proper divisors (915833329868).

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

823787117620 is a wasteful number, since it uses less digits than its factorization.

823787117620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312040 (or 312038 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 52.

The spelling of 823787117620 in words is "eight hundred twenty-three billion, seven hundred eighty-seven million, one hundred seventeen thousand, six hundred twenty".