51301664063 has 4 divisors (see below), whose sum is σ = 55247945928. Its totient is φ = 47355382200.

The previous prime is 51301664053. The next prime is 51301664069. The reversal of 51301664063 is 36046610315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51301664063 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 (51301664069) 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, 1973140913 + ... + 1973140938.

It is an arithmetic number, because the mean of its divisors is an integer number (13811986482).

Almost surely, 2^51301664063 is an apocalyptic number.

51301664063 is a deficient number, since it is larger than the sum of its proper divisors (3946281865).

51301664063 is a wasteful number, since it uses less digits than its factorization.

51301664063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946281864.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 51301664063 in words is "fifty-one billion, three hundred one million, six hundred sixty-four thousand, sixty-three".