165158438 has 4 divisors (see below), whose sum is σ = 247737660. Its totient is φ = 82579218.

The previous prime is 165158437. The next prime is 165158447. The reversal of 165158438 is 834851561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834851561 = 1499 ⋅556939.

It is a junction number, because it is equal to n+sod(n) for n = 165158395 and 165158404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165158437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41289608 + ... + 41289611.

It is an arithmetic number, because the mean of its divisors is an integer number (61934415).

Almost surely, 2^165158438 is an apocalyptic number.

165158438 is a deficient number, since it is larger than the sum of its proper divisors (82579222).

165158438 is an equidigital number, since it uses as much as digits as its factorization.

165158438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82579221.

The product of its digits is 115200, while the sum is 41.

The square root of 165158438 is about 12851.3982896804. The cubic root of 165158438 is about 548.6561549971.

The spelling of 165158438 in words is "one hundred sixty-five million, one hundred fifty-eight thousand, four hundred thirty-eight".