51775959779 has 8 divisors (see below), whose sum is σ = 52533319872. Its totient is φ = 51019899840.

The previous prime is 51775959769. The next prime is 51775959791. The reversal of 51775959779 is 97795957715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51775959779 - 2²⁰ = 51774911203 is a prime.

It is a super-2 number, since 2×51775959779² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51775959769) 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 7 ways as a sum of consecutive naturals, for example, 244667 + ... + 404244.

It is an arithmetic number, because the mean of its divisors is an integer number (6566664984).

Almost surely, 2^51775959779 is an apocalyptic number.

51775959779 is a deficient number, since it is larger than the sum of its proper divisors (757360093).

51775959779 is a wasteful number, since it uses less digits than its factorization.

51775959779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650077.

The product of its digits is 218791125, while the sum is 71.

The spelling of 51775959779 in words is "fifty-one billion, seven hundred seventy-five million, nine hundred fifty-nine thousand, seven hundred seventy-nine".