51105958311 has 4 divisors (see below), whose sum is σ = 68141277752. Its totient is φ = 34070638872.

The previous prime is 51105958303. The next prime is 51105958357. The reversal of 51105958311 is 11385950115.

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

It is not a de Polignac number, because 51105958311 - 2³ = 51105958303 is a prime.

It is a super-2 number, since 2×51105958311² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51105958311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105958361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8517659716 + ... + 8517659721.

It is an arithmetic number, because the mean of its divisors is an integer number (17035319438).

Almost surely, 2^51105958311 is an apocalyptic number.

51105958311 is a deficient number, since it is larger than the sum of its proper divisors (17035319441).

51105958311 is a wasteful number, since it uses less digits than its factorization.

51105958311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17035319440.

The product of its (nonzero) digits is 27000, while the sum is 39.

The spelling of 51105958311 in words is "fifty-one billion, one hundred five million, nine hundred fifty-eight thousand, three hundred eleven".