51366060720 has 240 divisors, whose sum is σ = 195552171360. Its totient is φ = 11978440704.

The previous prime is 51366060679. The next prime is 51366060751. The reversal of 51366060720 is 2706066315.

51366060720 is a `hidden beast` number, since 513 + 6 + 60 + 60 + 7 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33424 + ... + 322256.

It is an arithmetic number, because the mean of its divisors is an integer number (814800714).

Almost surely, 2^51366060720 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 51366060720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97776085680).

51366060720 is an abundant number, since it is smaller than the sum of its proper divisors (144186110640).

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

51366060720 is a wasteful number, since it uses less digits than its factorization.

51366060720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288884 (or 288875 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 51366060720 in words is "fifty-one billion, three hundred sixty-six million, sixty thousand, seven hundred twenty".