158128225609 has 2 divisors, whose sum is σ = 158128225610. Its totient is φ = 158128225608.

The previous prime is 158128225571. The next prime is 158128225613. The reversal of 158128225609 is 906522821851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96895238400 + 61232987209 = 311280^2 + 247453^2 .

It is an emirp because it is prime and its reverse (906522821851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158128225609 - 2²⁵ = 158094671177 is a prime.

It is not a weakly prime, because it can be changed into another prime (158128225639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79064112804 + 79064112805.

It is an arithmetic number, because the mean of its divisors is an integer number (79064112805).

Almost surely, 2^158128225609 is an apocalyptic number.

It is an amenable number.

158128225609 is a deficient number, since it is larger than the sum of its proper divisors (1).

158128225609 is an equidigital number, since it uses as much as digits as its factorization.

158128225609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 49.

The spelling of 158128225609 in words is "one hundred fifty-eight billion, one hundred twenty-eight million, two hundred twenty-five thousand, six hundred nine".