836848878509 has 12 divisors (see below), whose sum is σ = 999787465404. Its totient is φ = 697912576704.

The previous prime is 836848878451. The next prime is 836848878529. The reversal of 836848878509 is 905878848638.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 344543172484 + 492305706025 = 586978^2 + 701645^2 .

It is a de Polignac number, because none of the positive numbers 2^k-836848878509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (836848878529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230789384 + ... + 230793009.

It is an arithmetic number, because the mean of its divisors is an integer number (83315622117).

Almost surely, 2^836848878509 is an apocalyptic number.

It is an amenable number.

836848878509 is a deficient number, since it is larger than the sum of its proper divisors (162938586895).

836848878509 is a wasteful number, since it uses less digits than its factorization.

836848878509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461582444 (or 461582437 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 74.

The spelling of 836848878509 in words is "eight hundred thirty-six billion, eight hundred forty-eight million, eight hundred seventy-eight thousand, five hundred nine".