51546777727 has 4 divisors (see below), whose sum is σ = 53787942000. Its totient is φ = 49305613456.

The previous prime is 51546777673. The next prime is 51546777761. The reversal of 51546777727 is 72777764515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72777764515 = 5 ⋅14555552903.

It is a cyclic number.

It is not a de Polignac number, because 51546777727 - 2⁷ = 51546777599 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 (51546777767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120582102 + ... + 1120582147.

It is an arithmetic number, because the mean of its divisors is an integer number (13446985500).

Almost surely, 2^51546777727 is an apocalyptic number.

51546777727 is a deficient number, since it is larger than the sum of its proper divisors (2241164273).

51546777727 is a wasteful number, since it uses less digits than its factorization.

51546777727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241164272.

The product of its digits is 20168400, while the sum is 58.

The spelling of 51546777727 in words is "fifty-one billion, five hundred forty-six million, seven hundred seventy-seven thousand, seven hundred twenty-seven".