51228627648 has 336 divisors, whose sum is σ = 155678806752. Its totient is φ = 14841446400.

The previous prime is 51228627641. The next prime is 51228627677. The reversal of 51228627648 is 84672682215.

It is a self number, because there is not a number n which added to its sum of digits gives 51228627648.

It is not an unprimeable number, because it can be changed into a prime (51228627641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52434136 + ... + 52435112.

It is an arithmetic number, because the mean of its divisors is an integer number (463329782).

Almost surely, 2^51228627648 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 51228627648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77839403376).

51228627648 is an abundant number, since it is smaller than the sum of its proper divisors (104450179104).

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

51228627648 is a wasteful number, since it uses less digits than its factorization.

51228627648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1091 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 51.

It can be divided in two parts, 51228 and 627648, that added together give a palindrome (678876).

The spelling of 51228627648 in words is "fifty-one billion, two hundred twenty-eight million, six hundred twenty-seven thousand, six hundred forty-eight".