165253945 has 8 divisors (see below), whose sum is σ = 202916736. Its totient is φ = 129128496.

The previous prime is 165253939. The next prime is 165253967. The reversal of 165253945 is 549352561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165253945 - 2³ = 165253937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165253898 and 165253907.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384097 + ... + 384526.

It is an arithmetic number, because the mean of its divisors is an integer number (25364592).

Almost surely, 2^165253945 is an apocalyptic number.

It is an amenable number.

165253945 is a deficient number, since it is larger than the sum of its proper divisors (37662791).

165253945 is an equidigital number, since it uses as much as digits as its factorization.

165253945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768671.

The product of its digits is 162000, while the sum is 40.

The square root of 165253945 is about 12855.1135739829. The cubic root of 165253945 is about 548.7618926686.

The spelling of 165253945 in words is "one hundred sixty-five million, two hundred fifty-three thousand, nine hundred forty-five".