51127881859 has 2 divisors, whose sum is σ = 51127881860. Its totient is φ = 51127881858.

The previous prime is 51127881829. The next prime is 51127881863. The reversal of 51127881859 is 95818872115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51127881859 - 2⁷ = 51127881731 is a prime.

It is a super-2 number, since 2×51127881859² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51127881829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25563940929 + 25563940930.

It is an arithmetic number, because the mean of its divisors is an integer number (25563940930).

Almost surely, 2^51127881859 is an apocalyptic number.

51127881859 is a deficient number, since it is larger than the sum of its proper divisors (1).

51127881859 is an equidigital number, since it uses as much as digits as its factorization.

51127881859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 55.

The spelling of 51127881859 in words is "fifty-one billion, one hundred twenty-seven million, eight hundred eighty-one thousand, eight hundred fifty-nine".