51211856602248 has 128 divisors (see below), whose sum is σ = 130268021022720. Its totient is φ = 16775281313280.

The previous prime is 51211856602169. The next prime is 51211856602273. The reversal of 51211856602248 is 84220665811215.

It is a self number, because there is not a number n which added to its sum of digits gives 51211856602248.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 160759461 + ... + 161077707.

It is an arithmetic number, because the mean of its divisors is an integer number (1017718914240).

Almost surely, 2^{51211856602248} is an apocalyptic number.

It is an amenable number.

51211856602248 is an abundant number, since it is smaller than the sum of its proper divisors (79056164420472).

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

51211856602248 is a wasteful number, since it uses less digits than its factorization.

51211856602248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318867 (or 318863 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 51.

The spelling of 51211856602248 in words is "fifty-one trillion, two hundred eleven billion, eight hundred fifty-six million, six hundred two thousand, two hundred forty-eight".