51550565109 has 8 divisors (see below), whose sum is σ = 68849998272. Its totient is φ = 34309087680.

The previous prime is 51550565057. The next prime is 51550565117. The reversal of 51550565109 is 90156505515.

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

It is not a de Polignac number, because 51550565109 - 2⁸ = 51550564853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550565189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14486857 + ... + 14490414.

It is an arithmetic number, because the mean of its divisors is an integer number (8606249784).

Almost surely, 2^51550565109 is an apocalyptic number.

It is an amenable number.

51550565109 is a deficient number, since it is larger than the sum of its proper divisors (17299433163).

51550565109 is a wasteful number, since it uses less digits than its factorization.

51550565109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28977867.

The product of its (nonzero) digits is 168750, while the sum is 42.

The spelling of 51550565109 in words is "fifty-one billion, five hundred fifty million, five hundred sixty-five thousand, one hundred nine".