51340240366056 has 160 divisors (see below), whose sum is σ = 144101890326240. Its totient is φ = 17077528121472.

The previous prime is 51340240366033. The next prime is 51340240366061. The reversal of 51340240366056 is 65066304204315.

51340240366056 is a `hidden beast` number, since 5 + 1 + 3 + 4 + 0 + 2 + 4 + 0 + 36 + 605 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1473456171 + ... + 1473491013.

It is an arithmetic number, because the mean of its divisors is an integer number (900636814539).

Almost surely, 2^{51340240366056} 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 51340240366056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72050945163120).

51340240366056 is an abundant number, since it is smaller than the sum of its proper divisors (92761649960184).

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

51340240366056 is a wasteful number, since it uses less digits than its factorization.

51340240366056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39565 (or 39552 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 51340240366056 in words is "fifty-one trillion, three hundred forty billion, two hundred forty million, three hundred sixty-six thousand, fifty-six".