849900121688 has 32 divisors (see below), whose sum is σ = 1687725508800. Its totient is φ = 400114414368.

The previous prime is 849900121657. The next prime is 849900121691. The reversal of 849900121688 is 886121009948.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17126906 + ... + 17176457.

It is an arithmetic number, because the mean of its divisors is an integer number (52741422150).

Almost surely, 2^849900121688 is an apocalyptic number.

It is an amenable number.

849900121688 is a deficient number, since it is larger than the sum of its proper divisors (837825387112).

849900121688 is a wasteful number, since it uses less digits than its factorization.

849900121688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34303551 (or 34303547 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 56.

The spelling of 849900121688 in words is "eight hundred forty-nine billion, nine hundred million, one hundred twenty-one thousand, six hundred eighty-eight".