158169319109 has 2 divisors, whose sum is σ = 158169319110. Its totient is φ = 158169319108.

The previous prime is 158169319097. The next prime is 158169319127. The reversal of 158169319109 is 901913961851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149577883009 + 8591436100 = 386753^2 + 92690^2 .

It is a cyclic number.

It is not a de Polignac number, because 158169319109 - 2⁴ = 158169319093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158169319409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79084659554 + 79084659555.

It is an arithmetic number, because the mean of its divisors is an integer number (79084659555).

Almost surely, 2^158169319109 is an apocalyptic number.

It is an amenable number.

158169319109 is a deficient number, since it is larger than the sum of its proper divisors (1).

158169319109 is an equidigital number, since it uses as much as digits as its factorization.

158169319109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 53.

The spelling of 158169319109 in words is "one hundred fifty-eight billion, one hundred sixty-nine million, three hundred nineteen thousand, one hundred nine".