1351504728209 has 2 divisors, whose sum is σ = 1351504728210. Its totient is φ = 1351504728208.

The previous prime is 1351504728199. The next prime is 1351504728221. The reversal of 1351504728209 is 9028274051531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 682446166609 + 669058561600 = 826103^2 + 817960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1351504728209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1351504758209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675752364104 + 675752364105.

It is an arithmetic number, because the mean of its divisors is an integer number (675752364105).

Almost surely, 2^{1351504728209} is an apocalyptic number.

It is an amenable number.

1351504728209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351504728209 is an equidigital number, since it uses as much as digits as its factorization.

1351504728209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 1351504728209 in words is "one trillion, three hundred fifty-one billion, five hundred four million, seven hundred twenty-eight thousand, two hundred nine".