851881480 has 16 divisors (see below), whose sum is σ = 1916733420. Its totient is φ = 340752576.

The previous prime is 851881447. The next prime is 851881487. The reversal of 851881480 is 84188158.

It can be written as a sum of positive squares in 2 ways, for example, as 846926404 + 4955076 = 29102^2 + 2226^2 .

It is not an unprimeable number, because it can be changed into a prime (851881487) 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 3 ways as a sum of consecutive naturals, for example, 10648479 + ... + 10648558.

Almost surely, 2^851881480 is an apocalyptic number.

It is an amenable number.

851881480 is an abundant number, since it is smaller than the sum of its proper divisors (1064851940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851881480 is a wasteful number, since it uses less digits than its factorization.

851881480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21297048 (or 21297044 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 43.

The square root of 851881480 is about 29187.0087538960. The cubic root of 851881480 is about 947.9666500638.

It can be divided in two parts, 85188 and 1480, that added together give a palindrome (86668).

The spelling of 851881480 in words is "eight hundred fifty-one million, eight hundred eighty-one thousand, four hundred eighty".