51565505601 has 16 divisors (see below), whose sum is σ = 73288755200. Its totient is φ = 32155435728.

The previous prime is 51565505539. The next prime is 51565505603. The reversal of 51565505601 is 10650556515.

It is not a de Polignac number, because 51565505601 - 2¹⁷ = 51565374529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51565505601.

It is not an unprimeable number, because it can be changed into a prime (51565505603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5721181 + ... + 5730186.

It is an arithmetic number, because the mean of its divisors is an integer number (4580547200).

Almost surely, 2^51565505601 is an apocalyptic number.

It is an amenable number.

51565505601 is a deficient number, since it is larger than the sum of its proper divisors (21723249599).

51565505601 is a wasteful number, since it uses less digits than its factorization.

51565505601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11451468.

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 51565505601 in words is "fifty-one billion, five hundred sixty-five million, five hundred five thousand, six hundred one".