51363443645565 has 32 divisors (see below), whose sum is σ = 82253455140096. Its totient is φ = 27369857164800.

The previous prime is 51363443645557. The next prime is 51363443645567. The reversal of 51363443645565 is 56554634436315.

It is not a de Polignac number, because 51363443645565 - 2³ = 51363443645557 is a prime.

It is a super-2 number, since 2×51363443645565² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51363443645499 and 51363443645508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51363443645567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426012040 + ... + 426132590.

It is an arithmetic number, because the mean of its divisors is an integer number (2570420473128).

Almost surely, 2^{51363443645565} is an apocalyptic number.

It is an amenable number.

51363443645565 is a deficient number, since it is larger than the sum of its proper divisors (30890011494531).

51363443645565 is a wasteful number, since it uses less digits than its factorization.

51363443645565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145189.

The product of its digits is 233280000, while the sum is 60.

The spelling of 51363443645565 in words is "fifty-one trillion, three hundred sixty-three billion, four hundred forty-three million, six hundred forty-five thousand, five hundred sixty-five".