51585386757 has 4 divisors (see below), whose sum is σ = 68780515680. Its totient is φ = 34390257836.

The previous prime is 51585386747. The next prime is 51585386773. The reversal of 51585386757 is 75768358515.

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 not a de Polignac number, because 51585386757 - 2¹¹ = 51585384709 is a prime.

It is a super-2 number, since 2×51585386757² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51585386757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51585386747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8597564457 + ... + 8597564462.

It is an arithmetic number, because the mean of its divisors is an integer number (17195128920).

Almost surely, 2^51585386757 is an apocalyptic number.

It is an amenable number.

51585386757 is a deficient number, since it is larger than the sum of its proper divisors (17195128923).

51585386757 is a wasteful number, since it uses less digits than its factorization.

51585386757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17195128922.

The product of its digits is 35280000, while the sum is 60.

The spelling of 51585386757 in words is "fifty-one billion, five hundred eighty-five million, three hundred eighty-six thousand, seven hundred fifty-seven".