51021044064260 has 12 divisors (see below), whose sum is σ = 107144192534988. Its totient is φ = 20408417625696.

The previous prime is 51021044064259. The next prime is 51021044064283. The reversal of 51021044064260 is 6246044012015.

It can be written as a sum of positive squares in 2 ways, for example, as 6496065392644 + 44524978671616 = 2548738^2 + 6672704^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51021044064260.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275526101587 + ... + 1275526101626.

It is an arithmetic number, because the mean of its divisors is an integer number (8928682711249).

Almost surely, 2^{51021044064260} is an apocalyptic number.

It is an amenable number.

51021044064260 is an abundant number, since it is smaller than the sum of its proper divisors (56123148470728).

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

51021044064260 is a wasteful number, since it uses less digits than its factorization.

51021044064260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551052203222 (or 2551052203220 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 51021044064260 its reverse (6246044012015), we get a palindrome (57267088076275).

The spelling of 51021044064260 in words is "fifty-one trillion, twenty-one billion, forty-four million, sixty-four thousand, two hundred sixty".