51106005009 has 6 divisors (see below), whose sum is σ = 73819785026. Its totient is φ = 34070670000.

The previous prime is 51106004981. The next prime is 51106005011. The reversal of 51106005009 is 90050060115.

51106005009 is a `hidden beast` number, since 5 + 1 + 1 + 0 + 600 + 50 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29164100625 + 21941904384 = 170775^2 + 148128^2 .

It is not a de Polignac number, because 51106005009 - 2⁷ = 51106004881 is a prime.

It is a super-2 number, since 2×51106005009² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51106005019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2839222492 + ... + 2839222509.

Almost surely, 2^51106005009 is an apocalyptic number.

It is an amenable number.

51106005009 is a deficient number, since it is larger than the sum of its proper divisors (22713780017).

51106005009 is a wasteful number, since it uses less digits than its factorization.

51106005009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5678445007 (or 5678445004 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The spelling of 51106005009 in words is "fifty-one billion, one hundred six million, five thousand, nine".