51005060605604 has 72 divisors (see below), whose sum is σ = 105805561870008. Its totient is φ = 21443883202560.

The previous prime is 51005060605567. The next prime is 51005060605627. The reversal of 51005060605604 is 40650606050015.

It can be written as a sum of positive squares in 4 ways, for example, as 12213962543104 + 38791098062500 = 3494848^2 + 6228250^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75005684 + ... + 75682644.

It is an arithmetic number, because the mean of its divisors is an integer number (1469521692639).

Almost surely, 2^{51005060605604} 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 51005060605604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52902780935004).

51005060605604 is an abundant number, since it is smaller than the sum of its proper divisors (54800501264404).

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

51005060605604 is a wasteful number, since it uses less digits than its factorization.

51005060605604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684285 (or 684276 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 51005060605604 its reverse (40650606050015), we get a palindrome (91655666655619).

The spelling of 51005060605604 in words is "fifty-one trillion, five billion, sixty million, six hundred five thousand, six hundred four".