51630360225361 has 4 divisors (see below), whose sum is σ = 51646001052724. Its totient is φ = 51614719398000.

The previous prime is 51630360225319. The next prime is 51630360225401. The reversal of 51630360225361 is 16352206303615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3248862051600 + 48381498173761 = 1802460^2 + 6955681^2 .

It is a cyclic number.

It is not a de Polignac number, because 51630360225361 - 2²⁹ = 51629823354449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51630360223361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7820408730 + ... + 7820415331.

It is an arithmetic number, because the mean of its divisors is an integer number (12911500263181).

Almost surely, 2^{51630360225361} is an apocalyptic number.

It is an amenable number.

51630360225361 is a deficient number, since it is larger than the sum of its proper divisors (15640827363).

51630360225361 is a wasteful number, since it uses less digits than its factorization.

51630360225361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15640827362.

The product of its (nonzero) digits is 583200, while the sum is 43.

Adding to 51630360225361 its reverse (16352206303615), we get a palindrome (67982566528976).

The spelling of 51630360225361 in words is "fifty-one trillion, six hundred thirty billion, three hundred sixty million, two hundred twenty-five thousand, three hundred sixty-one".