51170000850 has 144 divisors (see below), whose sum is σ = 148032087840. Its totient is φ = 12624883200.

The previous prime is 51170000831. The next prime is 51170000899. The reversal of 51170000850 is 5800007115.

51170000850 is a `hidden beast` number, since 511 + 70 + 0 + 0 + 0 + 85 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 394665 + ... + 508035.

It is an arithmetic number, because the mean of its divisors is an integer number (1028000610).

Almost surely, 2^51170000850 is an apocalyptic number.

51170000850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51170000850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74016043920).

51170000850 is an abundant number, since it is smaller than the sum of its proper divisors (96862086990).

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

51170000850 is a wasteful number, since it uses less digits than its factorization.

51170000850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113465 (or 113457 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

Adding to 51170000850 its reverse (5800007115), we get a palindrome (56970007965).

The spelling of 51170000850 in words is "fifty-one billion, one hundred seventy million, eight hundred fifty", and thus it is an aban number.