51312353663 has 8 divisors (see below), whose sum is σ = 51404950128. Its totient is φ = 51219820224.

The previous prime is 51312353593. The next prime is 51312353711. The reversal of 51312353663 is 36635321315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51312353663 - 2¹⁰ = 51312352639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312353063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1798556 + ... + 1826862.

It is an arithmetic number, because the mean of its divisors is an integer number (6425618766).

Almost surely, 2^51312353663 is an apocalyptic number.

51312353663 is a deficient number, since it is larger than the sum of its proper divisors (92596465).

51312353663 is a wasteful number, since it uses less digits than its factorization.

51312353663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31513.

The product of its digits is 145800, while the sum is 38.

Adding to 51312353663 its reverse (36635321315), we get a palindrome (87947674978).

The spelling of 51312353663 in words is "fifty-one billion, three hundred twelve million, three hundred fifty-three thousand, six hundred sixty-three".