158533355509 has 2 divisors, whose sum is σ = 158533355510. Its totient is φ = 158533355508.

The previous prime is 158533355507. The next prime is 158533355521. The reversal of 158533355509 is 905553335851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129040445284 + 29492910225 = 359222^2 + 171735^2 .

It is a cyclic number.

It is not a de Polignac number, because 158533355509 - 2¹ = 158533355507 is a prime.

Together with 158533355507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158533355507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79266677754 + 79266677755.

It is an arithmetic number, because the mean of its divisors is an integer number (79266677755).

Almost surely, 2^158533355509 is an apocalyptic number.

It is an amenable number.

158533355509 is a deficient number, since it is larger than the sum of its proper divisors (1).

158533355509 is an equidigital number, since it uses as much as digits as its factorization.

158533355509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6075000, while the sum is 52.

The spelling of 158533355509 in words is "one hundred fifty-eight billion, five hundred thirty-three million, three hundred fifty-five thousand, five hundred nine".