51012518788 has 144 divisors (see below), whose sum is σ = 120366872640. Its totient is φ = 18670176000.

The previous prime is 51012518779. The next prime is 51012518789. The reversal of 51012518788 is 88781521015.

It is not an unprimeable number, because it can be changed into a prime (51012518789) 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, 2302363 + ... + 2324413.

It is an arithmetic number, because the mean of its divisors is an integer number (835881060).

Almost surely, 2^51012518788 is an apocalyptic number.

51012518788 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51012518788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60183436320).

51012518788 is an abundant number, since it is smaller than the sum of its proper divisors (69354353852).

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

51012518788 is a wasteful number, since it uses less digits than its factorization.

51012518788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22146 (or 22137 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 46.

The spelling of 51012518788 in words is "fifty-one billion, twelve million, five hundred eighteen thousand, seven hundred eighty-eight".