51055555611 has 4 divisors (see below), whose sum is σ = 68074074152. Its totient is φ = 34037037072.

The previous prime is 51055555601. The next prime is 51055555627. The reversal of 51055555611 is 11655555015.

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

It is not a de Polignac number, because 51055555611 - 2⁶ = 51055555547 is a prime.

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 51055555611.

It is not an unprimeable number, because it can be changed into a prime (51055555601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8509259266 + ... + 8509259271.

It is an arithmetic number, because the mean of its divisors is an integer number (17018518538).

Almost surely, 2^51055555611 is an apocalyptic number.

51055555611 is a deficient number, since it is larger than the sum of its proper divisors (17018518541).

51055555611 is a wasteful number, since it uses less digits than its factorization.

51055555611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17018518540.

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 51055555611 in words is "fifty-one billion, fifty-five million, five hundred fifty-five thousand, six hundred eleven".