823675686840 has 96 divisors (see below), whose sum is σ = 2776092162480. Its totient is φ = 219646847232.

The previous prime is 823675686817. The next prime is 823675686871. The reversal of 823675686840 is 48686576328.

823675686840 is a `hidden beast` number, since 8 + 2 + 3 + 6 + 7 + 568 + 68 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42360429 + ... + 42379868.

Almost surely, 2^823675686840 is an apocalyptic number.

It is an amenable number.

823675686840 is an abundant number, since it is smaller than the sum of its proper divisors (1952416475640).

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

823675686840 is a wasteful number, since it uses less digits than its factorization.

823675686840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84740323 (or 84740307 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 63.

The spelling of 823675686840 in words is "eight hundred twenty-three billion, six hundred seventy-five million, six hundred eighty-six thousand, eight hundred forty".