851458647 has 32 divisors (see below), whose sum is σ = 1331366400. Its totient is φ = 479267712.

The previous prime is 851458637. The next prime is 851458669. The reversal of 851458647 is 746854158.

It is not a de Polignac number, because 851458647 - 2⁴ = 851458631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 851458596 and 851458605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851458637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1678 + ... + 41300.

It is an arithmetic number, because the mean of its divisors is an integer number (41605200).

Almost surely, 2^851458647 is an apocalyptic number.

851458647 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

851458647 is a deficient number, since it is larger than the sum of its proper divisors (479907753).

851458647 is a wasteful number, since it uses less digits than its factorization.

851458647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39687.

The product of its digits is 1075200, while the sum is 48.

The square root of 851458647 is about 29179.7643410635. The cubic root of 851458647 is about 947.8097824212.

It can be divided in two parts, 8514 and 58647, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 851458647 in words is "eight hundred fifty-one million, four hundred fifty-eight thousand, six hundred forty-seven".