851771853 has 12 divisors (see below), whose sum is σ = 1250507388. Its totient is φ = 558538560.

The previous prime is 851771827. The next prime is 851771867. The reversal of 851771853 is 358177158.

It can be written as a sum of positive squares in 2 ways, for example, as 327682404 + 524089449 = 18102^2 + 22893^2 .

It is not a de Polignac number, because 851771853 - 2¹⁴ = 851755469 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 851771799 and 851771808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851771153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 775200 + ... + 776297.

It is an arithmetic number, because the mean of its divisors is an integer number (104208949).

Almost surely, 2^851771853 is an apocalyptic number.

It is an amenable number.

851771853 is a deficient number, since it is larger than the sum of its proper divisors (398735535).

851771853 is a wasteful number, since it uses less digits than its factorization.

851771853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551564 (or 1551561 counting only the distinct ones).

The product of its digits is 235200, while the sum is 45.

The square root of 851771853 is about 29185.1306832777. The cubic root of 851771853 is about 947.9259843137.

The spelling of 851771853 in words is "eight hundred fifty-one million, seven hundred seventy-one thousand, eight hundred fifty-three".