51775885783 has 4 divisors (see below), whose sum is σ = 51789327448. Its totient is φ = 51762444120.

The previous prime is 51775885771. The next prime is 51775885807. The reversal of 51775885783 is 38758857715.

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 51775885783 - 2¹⁷ = 51775754711 is a prime.

It is a super-2 number, since 2×51775885783² (a number of 22 digits) contains 22 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 (51775885283) 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, 6715053 + ... + 6722758.

It is an arithmetic number, because the mean of its divisors is an integer number (12947331862).

Almost surely, 2^51775885783 is an apocalyptic number.

51775885783 is a deficient number, since it is larger than the sum of its proper divisors (13441665).

51775885783 is a wasteful number, since it uses less digits than its factorization.

51775885783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13441664.

The product of its digits is 65856000, while the sum is 64.

The spelling of 51775885783 in words is "fifty-one billion, seven hundred seventy-five million, eight hundred eighty-five thousand, seven hundred eighty-three".