51560784889 has 2 divisors, whose sum is σ = 51560784890. Its totient is φ = 51560784888.

The previous prime is 51560784881. The next prime is 51560784901. The reversal of 51560784889 is 98848706515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27260651664 + 24300133225 = 165108^2 + 155885^2 .

It is a cyclic number.

It is not a de Polignac number, because 51560784889 - 2³ = 51560784881 is a prime.

It is not a weakly prime, because it can be changed into another prime (51560784881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25780392444 + 25780392445.

It is an arithmetic number, because the mean of its divisors is an integer number (25780392445).

Almost surely, 2^51560784889 is an apocalyptic number.

It is an amenable number.

51560784889 is a deficient number, since it is larger than the sum of its proper divisors (1).

51560784889 is an equidigital number, since it uses as much as digits as its factorization.

51560784889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19353600, while the sum is 61.

The spelling of 51560784889 in words is "fifty-one billion, five hundred sixty million, seven hundred eighty-four thousand, eight hundred eighty-nine".