51563740065 has 16 divisors (see below), whose sum is σ = 82892993856. Its totient is φ = 27370324800.

The previous prime is 51563740061. The next prime is 51563740069. The reversal of 51563740065 is 56004736515.

It is an interprime number because it is at equal distance from previous prime (51563740061) and next prime (51563740069).

It is not a de Polignac number, because 51563740065 - 2² = 51563740061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51563739999 and 51563740026.

It is not an unprimeable number, because it can be changed into a prime (51563740061) 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, 8142766 + ... + 8149095.

It is an arithmetic number, because the mean of its divisors is an integer number (5180812116).

Almost surely, 2^51563740065 is an apocalyptic number.

It is an amenable number.

51563740065 is a deficient number, since it is larger than the sum of its proper divisors (31329253791).

51563740065 is a wasteful number, since it uses less digits than its factorization.

51563740065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16292080.

The product of its (nonzero) digits is 378000, while the sum is 42.

The spelling of 51563740065 in words is "fifty-one billion, five hundred sixty-three million, seven hundred forty thousand, sixty-five".