51606550011 has 8 divisors (see below), whose sum is σ = 68811394624. Its totient is φ = 34403036040.

The previous prime is 51606550001. The next prime is 51606550019. The reversal of 51606550011 is 11005560615.

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

It is not a de Polignac number, because 51606550011 - 2⁵ = 51606549979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51606550019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238345 + ... + 400026.

It is an arithmetic number, because the mean of its divisors is an integer number (8601424328).

Almost surely, 2^51606550011 is an apocalyptic number.

51606550011 is a deficient number, since it is larger than the sum of its proper divisors (17204844613).

51606550011 is a wasteful number, since it uses less digits than its factorization.

51606550011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665321.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 51606550011 in words is "fifty-one billion, six hundred six million, five hundred fifty thousand, eleven".