51651110066563 has 4 divisors (see below), whose sum is σ = 59029840076080. Its totient is φ = 44272380057048.

The previous prime is 51651110066561. The next prime is 51651110066603. The reversal of 51651110066563 is 36566001115615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51651110066563 - 2¹ = 51651110066561 is a prime.

It is a super-2 number, since 2×51651110066563² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51651110066561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3689365004748 + ... + 3689365004761.

It is an arithmetic number, because the mean of its divisors is an integer number (14757460019020).

Almost surely, 2^{51651110066563} is an apocalyptic number.

51651110066563 is a deficient number, since it is larger than the sum of its proper divisors (7378730009517).

51651110066563 is an equidigital number, since it uses as much as digits as its factorization.

51651110066563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7378730009516.

The product of its (nonzero) digits is 486000, while the sum is 46.

The spelling of 51651110066563 in words is "fifty-one trillion, six hundred fifty-one billion, one hundred ten million, sixty-six thousand, five hundred sixty-three".