851003908851 has 4 divisors (see below), whose sum is σ = 1134671878472. Its totient is φ = 567335939232.

The previous prime is 851003908849. The next prime is 851003908901. The reversal of 851003908851 is 158809300158.

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

It is not a de Polignac number, because 851003908851 - 2¹ = 851003908849 is a prime.

It is a super-2 number, since 2×851003908851² (a number of 25 digits) contains 22 as substring.

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 851003908851.

It is not an unprimeable number, because it can be changed into a prime (851003908801) 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 in 3 ways as a sum of consecutive naturals, for example, 141833984806 + ... + 141833984811.

It is an arithmetic number, because the mean of its divisors is an integer number (283667969618).

Almost surely, 2^851003908851 is an apocalyptic number.

851003908851 is a deficient number, since it is larger than the sum of its proper divisors (283667969621).

851003908851 is a wasteful number, since it uses less digits than its factorization.

851003908851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283667969620.

The product of its (nonzero) digits is 345600, while the sum is 48.

The spelling of 851003908851 in words is "eight hundred fifty-one billion, three million, nine hundred eight thousand, eight hundred fifty-one".