51210504101620 has 24 divisors (see below), whose sum is σ = 111250405463400. Its totient is φ = 19777849859712.

The previous prime is 51210504101599. The next prime is 51210504101657. The reversal of 51210504101620 is 2610140501215.

It can be written as a sum of positive squares in 4 ways, for example, as 2911923822096 + 48298580279524 = 1706436^2 + 6949718^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44146985715 + ... + 44146986874.

It is an arithmetic number, because the mean of its divisors is an integer number (4635433560975).

Almost surely, 2^{51210504101620} is an apocalyptic number.

It is an amenable number.

51210504101620 is an abundant number, since it is smaller than the sum of its proper divisors (60039901361780).

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

51210504101620 is a wasteful number, since it uses less digits than its factorization.

51210504101620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88293972627 (or 88293972625 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 51210504101620 its reverse (2610140501215), we get a palindrome (53820644602835).

The spelling of 51210504101620 in words is "fifty-one trillion, two hundred ten billion, five hundred four million, one hundred one thousand, six hundred twenty".