51656105011 has 8 divisors (see below), whose sum is σ = 62142682880. Its totient is φ = 41946310728.

The previous prime is 51656105009. The next prime is 51656105051. The reversal of 51656105011 is 11050165615.

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

It is not a de Polignac number, because 51656105011 - 2¹ = 51656105009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51656105051) 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, 194195751 + ... + 194196016.

It is an arithmetic number, because the mean of its divisors is an integer number (7767835360).

Almost surely, 2^51656105011 is an apocalyptic number.

51656105011 is a deficient number, since it is larger than the sum of its proper divisors (10486577869).

51656105011 is a wasteful number, since it uses less digits than its factorization.

51656105011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388391793.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 51656105011 in words is "fifty-one billion, six hundred fifty-six million, one hundred five thousand, eleven".