51214689280 has 88 divisors (see below), whose sum is σ = 125469767808. Its totient is φ = 20049911808.

The previous prime is 51214689257. The next prime is 51214689287. The reversal of 51214689280 is 8298641215.

It is a self number, because there is not a number n which added to its sum of digits gives 51214689280.

It is not an unprimeable number, because it can be changed into a prime (51214689287) 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 7 ways as a sum of consecutive naturals, for example, 134227 + ... + 347053.

It is an arithmetic number, because the mean of its divisors is an integer number (1425792816).

Almost surely, 2^51214689280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51214689280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62734883904).

51214689280 is an abundant number, since it is smaller than the sum of its proper divisors (74255078528).

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

51214689280 is a wasteful number, since it uses less digits than its factorization.

51214689280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212899 (or 212881 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 51214689280 in words is "fifty-one billion, two hundred fourteen million, six hundred eighty-nine thousand, two hundred eighty".