851648871 has 8 divisors (see below), whose sum is σ = 1135672704. Its totient is φ = 567695480.

The previous prime is 851648857. The next prime is 851648923. The reversal of 851648871 is 178846158.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 851648871 - 2⁹ = 851648359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 851648871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851648801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26110 + ... + 48836.

It is an arithmetic number, because the mean of its divisors is an integer number (141959088).

Almost surely, 2^851648871 is an apocalyptic number.

851648871 is a deficient number, since it is larger than the sum of its proper divisors (284023833).

851648871 is a wasteful number, since it uses less digits than its factorization.

851648871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35221.

The product of its digits is 430080, while the sum is 48.

The square root of 851648871 is about 29183.0236781592. The cubic root of 851648871 is about 947.8803604204.

The spelling of 851648871 in words is "eight hundred fifty-one million, six hundred forty-eight thousand, eight hundred seventy-one".