51368149727 has 4 divisors (see below), whose sum is σ = 52756478136. Its totient is φ = 49979821320.

The previous prime is 51368149711. The next prime is 51368149787. The reversal of 51368149727 is 72794186315.

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

It is a cyclic number.

It is not a de Polignac number, because 51368149727 - 2⁴ = 51368149711 is a prime.

It is a super-3 number, since 3×51368149727³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51368149787) 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, 694164149 + ... + 694164222.

It is an arithmetic number, because the mean of its divisors is an integer number (13189119534).

Almost surely, 2^51368149727 is an apocalyptic number.

51368149727 is a deficient number, since it is larger than the sum of its proper divisors (1388328409).

51368149727 is a wasteful number, since it uses less digits than its factorization.

51368149727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388328408.

The product of its digits is 2540160, while the sum is 53.

The spelling of 51368149727 in words is "fifty-one billion, three hundred sixty-eight million, one hundred forty-nine thousand, seven hundred twenty-seven".