51105511489 has 2 divisors, whose sum is σ = 51105511490. Its totient is φ = 51105511488.

The previous prime is 51105511477. The next prime is 51105511519. The reversal of 51105511489 is 98411550115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26678322225 + 24427189264 = 163335^2 + 156292^2 .

It is a cyclic number.

It is not a de Polignac number, because 51105511489 - 2⁹ = 51105510977 is a prime.

It is a super-2 number, since 2×51105511489² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51105511189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552755744 + 25552755745.

It is an arithmetic number, because the mean of its divisors is an integer number (25552755745).

Almost surely, 2^51105511489 is an apocalyptic number.

It is an amenable number.

51105511489 is a deficient number, since it is larger than the sum of its proper divisors (1).

51105511489 is an equidigital number, since it uses as much as digits as its factorization.

51105511489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 40.

The spelling of 51105511489 in words is "fifty-one billion, one hundred five million, five hundred eleven thousand, four hundred eighty-nine".