51128086433 has 2 divisors, whose sum is σ = 51128086434. Its totient is φ = 51128086432.

The previous prime is 51128086421. The next prime is 51128086489. The reversal of 51128086433 is 33468082115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45730539409 + 5397547024 = 213847^2 + 73468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51128086433 is a prime.

It is a super-2 number, since 2×51128086433² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51128086733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25564043216 + 25564043217.

It is an arithmetic number, because the mean of its divisors is an integer number (25564043217).

Almost surely, 2^51128086433 is an apocalyptic number.

It is an amenable number.

51128086433 is a deficient number, since it is larger than the sum of its proper divisors (1).

51128086433 is an equidigital number, since it uses as much as digits as its factorization.

51128086433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 51128086433 in words is "fifty-one billion, one hundred twenty-eight million, eighty-six thousand, four hundred thirty-three".