51106660511 has 4 divisors (see below), whose sum is σ = 51110942400. Its totient is φ = 51102378624.

The previous prime is 51106660483. The next prime is 51106660513. The reversal of 51106660511 is 11506660115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11506660115 = 5 ⋅2301332023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51106660511 is a prime.

It is a super-2 number, since 2×51106660511² (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 (51106660513) 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, 2122991 + ... + 2146928.

It is an arithmetic number, because the mean of its divisors is an integer number (12777735600).

Almost surely, 2^51106660511 is an apocalyptic number.

51106660511 is a deficient number, since it is larger than the sum of its proper divisors (4281889).

51106660511 is a wasteful number, since it uses less digits than its factorization.

51106660511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281888.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 51106660511 in words is "fifty-one billion, one hundred six million, six hundred sixty thousand, five hundred eleven".