51118864360489 has 2 divisors, whose sum is σ = 51118864360490. Its totient is φ = 51118864360488.

The previous prime is 51118864360477. The next prime is 51118864360511. The reversal of 51118864360489 is 98406346881115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42772803368464 + 8346060992025 = 6540092^2 + 2888955^2 .

It is a cyclic number.

It is not a de Polignac number, because 51118864360489 - 2¹⁷ = 51118864229417 is a prime.

It is a super-2 number, since 2×51118864360489² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51118864360489.

It is not a weakly prime, because it can be changed into another prime (51118864360409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25559432180244 + 25559432180245.

It is an arithmetic number, because the mean of its divisors is an integer number (25559432180245).

Almost surely, 2^{51118864360489} is an apocalyptic number.

It is an amenable number.

51118864360489 is a deficient number, since it is larger than the sum of its proper divisors (1).

51118864360489 is an equidigital number, since it uses as much as digits as its factorization.

51118864360489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39813120, while the sum is 64.

The spelling of 51118864360489 in words is "fifty-one trillion, one hundred eighteen billion, eight hundred sixty-four million, three hundred sixty thousand, four hundred eighty-nine".