849763678109 has 4 divisors (see below), whose sum is σ = 894488082240. Its totient is φ = 805039273980.

The previous prime is 849763678061. The next prime is 849763678187. The reversal of 849763678109 is 901876367948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 849763678109 - 2³² = 845468710813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849763678909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22362202037 + ... + 22362202074.

It is an arithmetic number, because the mean of its divisors is an integer number (223622020560).

Almost surely, 2^849763678109 is an apocalyptic number.

It is an amenable number.

849763678109 is a deficient number, since it is larger than the sum of its proper divisors (44724404131).

849763678109 is a wasteful number, since it uses less digits than its factorization.

849763678109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44724404130.

The product of its (nonzero) digits is 109734912, while the sum is 68.

The spelling of 849763678109 in words is "eight hundred forty-nine billion, seven hundred sixty-three million, six hundred seventy-eight thousand, one hundred nine".