158165465 has 4 divisors (see below), whose sum is σ = 189798564. Its totient is φ = 126532368.

The previous prime is 158165429. The next prime is 158165521. The reversal of 158165465 is 564561851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564561851 = 7 ⋅80651693.

It can be written as a sum of positive squares in 2 ways, for example, as 61418569 + 96746896 = 7837^2 + 9836^2 .

It is a cyclic number.

It is not a de Polignac number, because 158165465 - 2⁶ = 158165401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15816542 + ... + 15816551.

It is an arithmetic number, because the mean of its divisors is an integer number (47449641).

Almost surely, 2^158165465 is an apocalyptic number.

It is an amenable number.

158165465 is a deficient number, since it is larger than the sum of its proper divisors (31633099).

158165465 is an equidigital number, since it uses as much as digits as its factorization.

158165465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31633098.

The product of its digits is 144000, while the sum is 41.

The square root of 158165465 is about 12576.3852119757. The cubic root of 158165465 is about 540.8006698101.

The spelling of 158165465 in words is "one hundred fifty-eight million, one hundred sixty-five thousand, four hundred sixty-five".