51541620468780 has 192 divisors, whose sum is σ = 158733857802240. Its totient is φ = 12416501892096.

The previous prime is 51541620468773. The next prime is 51541620468803. The reversal of 51541620468780 is 8786402614515.

It is a super-2 number, since 2×51541620468780² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51541620468780.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 888206127 + ... + 888264153.

It is an arithmetic number, because the mean of its divisors is an integer number (826738842720).

Almost surely, 2^{51541620468780} 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 51541620468780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79366928901120).

51541620468780 is an abundant number, since it is smaller than the sum of its proper divisors (107192237333460).

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

51541620468780 is a wasteful number, since it uses less digits than its factorization.

51541620468780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82328 (or 82326 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 57.

The spelling of 51541620468780 in words is "fifty-one trillion, five hundred forty-one billion, six hundred twenty million, four hundred sixty-eight thousand, seven hundred eighty".