823942709709 has 48 divisors (see below), whose sum is σ = 1291765595328. Its totient is φ = 465761657088.

The previous prime is 823942709701. The next prime is 823942709713. The reversal of 823942709709 is 907907249328.

It is not a de Polignac number, because 823942709709 - 2³ = 823942709701 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823942709701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5160297 + ... + 5317569.

It is an arithmetic number, because the mean of its divisors is an integer number (26911783236).

Almost surely, 2^823942709709 is an apocalyptic number.

It is an amenable number.

823942709709 is a deficient number, since it is larger than the sum of its proper divisors (467822885619).

823942709709 is a wasteful number, since it uses less digits than its factorization.

823942709709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157674 (or 157667 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 60.

The spelling of 823942709709 in words is "eight hundred twenty-three billion, nine hundred forty-two million, seven hundred nine thousand, seven hundred nine".