51741544218 has 384 divisors, whose sum is σ = 139360370688. Its totient is φ = 12674382336.

The previous prime is 51741544207. The next prime is 51741544243. The reversal of 51741544218 is 81244514715.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 51741544218.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 407413671 + ... + 407413797.

It is an arithmetic number, because the mean of its divisors is an integer number (362917632).

Almost surely, 2^51741544218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51741544218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69680185344).

51741544218 is an abundant number, since it is smaller than the sum of its proper divisors (87618826470).

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

51741544218 is a wasteful number, since it uses less digits than its factorization.

51741544218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 299 counting only the distinct ones).

The product of its digits is 179200, while the sum is 42.

The spelling of 51741544218 in words is "fifty-one billion, seven hundred forty-one million, five hundred forty-four thousand, two hundred eighteen".