851485633 has 4 divisors (see below), whose sum is σ = 851558848. Its totient is φ = 851412420.

The previous prime is 851485631. The next prime is 851485643. The reversal of 851485633 is 336584158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 851485633 - 2¹ = 851485631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 851485633.

It is not an unprimeable number, because it can be changed into a prime (851485631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14853 + ... + 43858.

It is an arithmetic number, because the mean of its divisors is an integer number (212889712).

Almost surely, 2^851485633 is an apocalyptic number.

It is an amenable number.

851485633 is a deficient number, since it is larger than the sum of its proper divisors (73215).

851485633 is a wasteful number, since it uses less digits than its factorization.

851485633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73214.

The product of its digits is 345600, while the sum is 43.

The square root of 851485633 is about 29180.2267468915. The cubic root of 851485633 is about 947.8197955615.

The spelling of 851485633 in words is "eight hundred fifty-one million, four hundred eighty-five thousand, six hundred thirty-three".