1728068515457 has 2 divisors, whose sum is σ = 1728068515458. Its totient is φ = 1728068515456.

The previous prime is 1728068515421. The next prime is 1728068515489. The reversal of 1728068515457 is 7545158608271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1491173130496 + 236895384961 = 1221136^2 + 486719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1728068515457 - 2²² = 1728064321153 is a prime.

It is a super-2 number, since 2×1728068515457² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1728068515396 and 1728068515405.

It is not a weakly prime, because it can be changed into another prime (1728068515757) 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, 864034257728 + 864034257729.

It is an arithmetic number, because the mean of its divisors is an integer number (864034257729).

Almost surely, 2^{1728068515457} is an apocalyptic number.

It is an amenable number.

1728068515457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728068515457 is an equidigital number, since it uses as much as digits as its factorization.

1728068515457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816000, while the sum is 59.

The spelling of 1728068515457 in words is "one trillion, seven hundred twenty-eight billion, sixty-eight million, five hundred fifteen thousand, four hundred fifty-seven".