823787854749 has 20 divisors (see below), whose sum is σ = 1230910356060. Its totient is φ = 549051912000.

The previous prime is 823787854733. The next prime is 823787854787. The reversal of 823787854749 is 947458787328.

It is a happy number.

823787854749 is a `hidden beast` number, since 8 + 2 + 3 + 7 + 8 + 78 + 547 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 187223232249 + 636564622500 = 432693^2 + 797850^2 .

It is not a de Polignac number, because 823787854749 - 2⁴ = 823787854733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823787894749) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 976002 + ... + 1612499.

It is an arithmetic number, because the mean of its divisors is an integer number (61545517803).

Almost surely, 2^823787854749 is an apocalyptic number.

It is an amenable number.

823787854749 is a deficient number, since it is larger than the sum of its proper divisors (407122501311).

823787854749 is a wasteful number, since it uses less digits than its factorization.

823787854749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592442 (or 2592433 counting only the distinct ones).

The product of its digits is 758661120, while the sum is 72.

The spelling of 823787854749 in words is "eight hundred twenty-three billion, seven hundred eighty-seven million, eight hundred fifty-four thousand, seven hundred forty-nine".