1512540390209 has 2 divisors, whose sum is σ = 1512540390210. Its totient is φ = 1512540390208.

The previous prime is 1512540390181. The next prime is 1512540390223. The reversal of 1512540390209 is 9020930452151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1453953640000 + 58586750209 = 1205800^2 + 242047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1512540390209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1512540390239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756270195104 + 756270195105.

It is an arithmetic number, because the mean of its divisors is an integer number (756270195105).

Almost surely, 2^{1512540390209} is an apocalyptic number.

It is an amenable number.

1512540390209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1512540390209 is an equidigital number, since it uses as much as digits as its factorization.

1512540390209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 41.

The spelling of 1512540390209 in words is "one trillion, five hundred twelve billion, five hundred forty million, three hundred ninety thousand, two hundred nine".