1216525410259 has 2 divisors, whose sum is σ = 1216525410260. Its totient is φ = 1216525410258.

The previous prime is 1216525410251. The next prime is 1216525410307. The reversal of 1216525410259 is 9520145256121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1216525410259 - 2³ = 1216525410251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216525410251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608262705129 + 608262705130.

It is an arithmetic number, because the mean of its divisors is an integer number (608262705130).

Almost surely, 2^{1216525410259} is an apocalyptic number.

1216525410259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216525410259 is an equidigital number, since it uses as much as digits as its factorization.

1216525410259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 1216525410259 in words is "one trillion, two hundred sixteen billion, five hundred twenty-five million, four hundred ten thousand, two hundred fifty-nine".