158144561 has 2 divisors, whose sum is σ = 158144562. Its totient is φ = 158144560.

The previous prime is 158144537. The next prime is 158144593. The reversal of 158144561 is 165441851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147379600 + 10764961 = 12140^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 158144561 - 2¹⁴ = 158128177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (158144501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79072280 + 79072281.

It is an arithmetic number, because the mean of its divisors is an integer number (79072281).

Almost surely, 2^158144561 is an apocalyptic number.

It is an amenable number.

158144561 is a deficient number, since it is larger than the sum of its proper divisors (1).

158144561 is an equidigital number, since it uses as much as digits as its factorization.

158144561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 35.

The square root of 158144561 is about 12575.5541031002. The cubic root of 158144561 is about 540.7768437170.

The spelling of 158144561 in words is "one hundred fifty-eight million, one hundred forty-four thousand, five hundred sixty-one".