51820239005280 has 144 divisors (see below), whose sum is σ = 176842575393120. Its totient is φ = 13818260772864.

The previous prime is 51820239005203. The next prime is 51820239005287. The reversal of 51820239005280 is 8250093202815.

51820239005280 is a `hidden beast` number, since 5 + 1 + 8 + 202 + 390 + 0 + 52 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51820239005287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42846949 + ... + 44039771.

It is an arithmetic number, because the mean of its divisors is an integer number (1228073440230).

Almost surely, 2^{51820239005280} is an apocalyptic number.

It is an amenable number.

51820239005280 is an abundant number, since it is smaller than the sum of its proper divisors (125022336387840).

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

51820239005280 is a wasteful number, since it uses less digits than its factorization.

51820239005280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223013 (or 1223002 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 51820239005280 in words is "fifty-one trillion, eight hundred twenty billion, two hundred thirty-nine million, five thousand, two hundred eighty".