51442281578516 has 6 divisors (see below), whose sum is σ = 90023992762410. Its totient is φ = 25721140789256.

The previous prime is 51442281578503. The next prime is 51442281578533. The reversal of 51442281578516 is 61587518224415.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 34824869587600 + 16617411990916 = 5901260^2 + 4076446^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6430285197311 + ... + 6430285197318.

It is an arithmetic number, because the mean of its divisors is an integer number (15003998793735).

Almost surely, 2^{51442281578516} is an apocalyptic number.

It is an amenable number.

51442281578516 is a deficient number, since it is larger than the sum of its proper divisors (38581711183894).

51442281578516 is a wasteful number, since it uses less digits than its factorization.

51442281578516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12860570394633 (or 12860570394631 counting only the distinct ones).

The product of its digits is 21504000, while the sum is 59.

The spelling of 51442281578516 in words is "fifty-one trillion, four hundred forty-two billion, two hundred eighty-one million, five hundred seventy-eight thousand, five hundred sixteen".