51065543369 has 2 divisors, whose sum is σ = 51065543370. Its totient is φ = 51065543368.

The previous prime is 51065543311. The next prime is 51065543393. The reversal of 51065543369 is 96334556015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26304947344 + 24760596025 = 162188^2 + 157355^2 .

It is a cyclic number.

It is not a de Polignac number, because 51065543369 - 2¹⁶ = 51065477833 is a prime.

It is a super-2 number, since 2×51065543369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51065549369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25532771684 + 25532771685.

It is an arithmetic number, because the mean of its divisors is an integer number (25532771685).

Almost surely, 2^51065543369 is an apocalyptic number.

It is an amenable number.

51065543369 is a deficient number, since it is larger than the sum of its proper divisors (1).

51065543369 is an equidigital number, since it uses as much as digits as its factorization.

51065543369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 47.

The spelling of 51065543369 in words is "fifty-one billion, sixty-five million, five hundred forty-three thousand, three hundred sixty-nine".