51518484483840 has 3240 divisors, whose sum is σ = 221756836981680. Its totient is φ = 11379545210880.

The previous prime is 51518484483787. The next prime is 51518484483887. The reversal of 51518484483840 is 4838448481515.

51518484483840 is a `hidden beast` number, since 5 + 1 + 5 + 184 + 8 + 448 + 3 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3240).

It is a super-2 number, since 2×51518484483840² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 200461028992 + ... + 200461029248.

Almost surely, 2^{51518484483840} 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 51518484483840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110878418490840).

51518484483840 is an abundant number, since it is smaller than the sum of its proper divisors (170238352497840).

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

51518484483840 is a wasteful number, since it uses less digits than its factorization.

51518484483840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 78643200, while the sum is 63.

The spelling of 51518484483840 in words is "fifty-one trillion, five hundred eighteen billion, four hundred eighty-four million, four hundred eighty-three thousand, eight hundred forty".