851642574934 has 4 divisors (see below), whose sum is σ = 1277463862404. Its totient is φ = 425821287466.

The previous prime is 851642574931. The next prime is 851642575027. The reversal of 851642574934 is 439475246158.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851642574931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212910643732 + ... + 212910643735.

It is an arithmetic number, because the mean of its divisors is an integer number (319365965601).

Almost surely, 2^851642574934 is an apocalyptic number.

851642574934 is a deficient number, since it is larger than the sum of its proper divisors (425821287470).

851642574934 is a wasteful number, since it uses less digits than its factorization.

851642574934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425821287469.

The product of its digits is 29030400, while the sum is 58.

The spelling of 851642574934 in words is "eight hundred fifty-one billion, six hundred forty-two million, five hundred seventy-four thousand, nine hundred thirty-four".