156536450509 has 2 divisors, whose sum is σ = 156536450510. Its totient is φ = 156536450508.

The previous prime is 156536450491. The next prime is 156536450533. The reversal of 156536450509 is 905054635651.

156536450509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80782145284 + 75754305225 = 284222^2 + 275235^2 .

It is a cyclic number.

It is not a de Polignac number, because 156536450509 - 2¹¹ = 156536448461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156536450909) 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, 78268225254 + 78268225255.

It is an arithmetic number, because the mean of its divisors is an integer number (78268225255).

Almost surely, 2^156536450509 is an apocalyptic number.

It is an amenable number.

156536450509 is a deficient number, since it is larger than the sum of its proper divisors (1).

156536450509 is an equidigital number, since it uses as much as digits as its factorization.

156536450509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430000, while the sum is 49.

The spelling of 156536450509 in words is "one hundred fifty-six billion, five hundred thirty-six million, four hundred fifty thousand, five hundred nine".