51894440850 has 48 divisors (see below), whose sum is σ = 147083675328. Its totient is φ = 11861586240.

The previous prime is 51894440797. The next prime is 51894440887. The reversal of 51894440850 is 5804449815.

It is a super-2 number, since 2×51894440850² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51894440850.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24710589 + ... + 24712688.

It is an arithmetic number, because the mean of its divisors is an integer number (3064243236).

Almost surely, 2^51894440850 is an apocalyptic number.

51894440850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51894440850 is an abundant number, since it is smaller than the sum of its proper divisors (95189234478).

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

51894440850 is a wasteful number, since it uses less digits than its factorization.

51894440850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49423299 (or 49423294 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 51894440850 in words is "fifty-one billion, eight hundred ninety-four million, four hundred forty thousand, eight hundred fifty".