851864673 has 16 divisors (see below), whose sum is σ = 1245312000. Its totient is φ = 513683280.

The previous prime is 851864669. The next prime is 851864681. The reversal of 851864673 is 376468158.

It is not a de Polignac number, because 851864673 - 2² = 851864669 is a prime.

It is a super-2 number, since 2×851864673² = 1451346842210793858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (851864623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58293 + ... + 71426.

It is an arithmetic number, because the mean of its divisors is an integer number (77832000).

Almost surely, 2^851864673 is an apocalyptic number.

It is an amenable number.

851864673 is a deficient number, since it is larger than the sum of its proper divisors (393447327).

851864673 is a wasteful number, since it uses less digits than its factorization.

851864673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129932.

The product of its digits is 967680, while the sum is 48.

The square root of 851864673 is about 29186.7208332831. The cubic root of 851864673 is about 947.9604157927.

The spelling of 851864673 in words is "eight hundred fifty-one million, eight hundred sixty-four thousand, six hundred seventy-three".