158405161 has 2 divisors, whose sum is σ = 158405162. Its totient is φ = 158405160.

The previous prime is 158405141. The next prime is 158405173. The reversal of 158405161 is 161504851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132710400 + 25694761 = 11520^2 + 5069^2 .

It is a cyclic number.

It is not a de Polignac number, because 158405161 - 2¹³ = 158396969 is a prime.

It is not a weakly prime, because it can be changed into another prime (158405101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79202580 + 79202581.

It is an arithmetic number, because the mean of its divisors is an integer number (79202581).

Almost surely, 2^158405161 is an apocalyptic number.

It is an amenable number.

158405161 is a deficient number, since it is larger than the sum of its proper divisors (1).

158405161 is an equidigital number, since it uses as much as digits as its factorization.

158405161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 158405161 is about 12585.9112105560. The cubic root of 158405161 is about 541.0737221055.

The spelling of 158405161 in words is "one hundred fifty-eight million, four hundred five thousand, one hundred sixty-one".