51365456317 has 4 divisors (see below), whose sum is σ = 58703378656. Its totient is φ = 44027533980.

The previous prime is 51365456291. The next prime is 51365456333. The reversal of 51365456317 is 71365456315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51365456317 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 (51365456117) 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, 3668961159 + ... + 3668961172.

It is an arithmetic number, because the mean of its divisors is an integer number (14675844664).

Almost surely, 2^51365456317 is an apocalyptic number.

It is an amenable number.

51365456317 is a deficient number, since it is larger than the sum of its proper divisors (7337922339).

51365456317 is an equidigital number, since it uses as much as digits as its factorization.

51365456317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7337922338.

The product of its digits is 1134000, while the sum is 46.

The spelling of 51365456317 in words is "fifty-one billion, three hundred sixty-five million, four hundred fifty-six thousand, three hundred seventeen".