849217646 has 8 divisors (see below), whose sum is σ = 1279389720. Its totient is φ = 422754408.

The previous prime is 849217613. The next prime is 849217703. The reversal of 849217646 is 646712948.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×849217646² = 1442341220555562632, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 849217646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926636 + ... + 927551.

It is an arithmetic number, because the mean of its divisors is an integer number (159923715).

Almost surely, 2^849217646 is an apocalyptic number.

849217646 is a deficient number, since it is larger than the sum of its proper divisors (430172074).

849217646 is a wasteful number, since it uses less digits than its factorization.

849217646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854418.

The product of its digits is 580608, while the sum is 47.

The square root of 849217646 is about 29141.3391250299. The cubic root of 849217646 is about 946.9775208784.

The spelling of 849217646 in words is "eight hundred forty-nine million, two hundred seventeen thousand, six hundred forty-six".