51129080065 has 32 divisors (see below), whose sum is σ = 74596633344. Its totient is φ = 32841123840.

The previous prime is 51129080059. The next prime is 51129080069. The reversal of 51129080065 is 56008092115.

It is not a de Polignac number, because 51129080065 - 2¹⁷ = 51128948993 is a prime.

It is a super-2 number, since 2×51129080065² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51129080069) 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 in 31 ways as a sum of consecutive naturals, for example, 78084 + ... + 329173.

It is an arithmetic number, because the mean of its divisors is an integer number (2331144792).

Almost surely, 2^51129080065 is an apocalyptic number.

It is an amenable number.

51129080065 is a deficient number, since it is larger than the sum of its proper divisors (23467553279).

51129080065 is a wasteful number, since it uses less digits than its factorization.

51129080065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407497.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 51129080065 in words is "fifty-one billion, one hundred twenty-nine million, eighty thousand, sixty-five".