851663400 has 96 divisors (see below), whose sum is σ = 3017336640. Its totient is φ = 194664960.

The previous prime is 851663363. The next prime is 851663401. The reversal of 851663400 is 4366158.

It is not an unprimeable number, because it can be changed into a prime (851663401) 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 23 ways as a sum of consecutive naturals, for example, 97189 + ... + 105588.

It is an arithmetic number, because the mean of its divisors is an integer number (31430590).

Almost surely, 2^851663400 is an apocalyptic number.

It is an amenable number.

851663400 is an abundant number, since it is smaller than the sum of its proper divisors (2165673240).

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

851663400 is a wasteful number, since it uses less digits than its factorization.

851663400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202803 (or 202794 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 851663400 is about 29183.2726060666. The cubic root of 851663400 is about 947.8857506213.

The spelling of 851663400 in words is "eight hundred fifty-one million, six hundred sixty-three thousand, four hundred".