165158649 has 8 divisors (see below), whose sum is σ = 244679520. Its totient is φ = 110105748.

The previous prime is 165158633. The next prime is 165158677. The reversal of 165158649 is 946851561.

165158649 is a `hidden beast` number, since 1 + 65 + 1 + 586 + 4 + 9 = 666.

It is not a de Polignac number, because 165158649 - 2⁴ = 165158633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165158449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3058467 + ... + 3058520.

It is an arithmetic number, because the mean of its divisors is an integer number (30584940).

Almost surely, 2^165158649 is an apocalyptic number.

It is an amenable number.

165158649 is a deficient number, since it is larger than the sum of its proper divisors (79520871).

165158649 is an equidigital number, since it uses as much as digits as its factorization.

165158649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116996 (or 6116990 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 165158649 is about 12851.4064989012. The cubic root of 165158649 is about 548.6563886443.

The spelling of 165158649 in words is "one hundred sixty-five million, one hundred fifty-eight thousand, six hundred forty-nine".