51127881849 has 12 divisors (see below), whose sum is σ = 80565147312. Its totient is φ = 30986595000.

The previous prime is 51127881829. The next prime is 51127881859. The reversal of 51127881849 is 94818872115.

51127881849 is a `hidden beast` number, since 511 + 2 + 7 + 8 + 81 + 8 + 49 = 666.

It is not a de Polignac number, because 51127881849 - 2¹² = 51127877753 is a prime.

It is a super-2 number, since 2×51127881849² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51127881795 and 51127881804.

It is not an unprimeable number, because it can be changed into a prime (51127881829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258221527 + ... + 258221724.

It is an arithmetic number, because the mean of its divisors is an integer number (6713762276).

Almost surely, 2^51127881849 is an apocalyptic number.

It is an amenable number.

51127881849 is a deficient number, since it is larger than the sum of its proper divisors (29437265463).

51127881849 is a wasteful number, since it uses less digits than its factorization.

51127881849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516443268 (or 516443265 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The spelling of 51127881849 in words is "fifty-one billion, one hundred twenty-seven million, eight hundred eighty-one thousand, eight hundred forty-nine".