165645465 has 32 divisors (see below), whose sum is σ = 270397440. Its totient is φ = 86575104.

The previous prime is 165645461. The next prime is 165645533. The reversal of 165645465 is 564546561.

It is not a de Polignac number, because 165645465 - 2² = 165645461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165645461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169057 + ... + 170033.

It is an arithmetic number, because the mean of its divisors is an integer number (8449920).

Almost surely, 2^165645465 is an apocalyptic number.

165645465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165645465 is a deficient number, since it is larger than the sum of its proper divisors (104751975).

165645465 is a wasteful number, since it uses less digits than its factorization.

165645465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201.

The product of its digits is 432000, while the sum is 42.

The square root of 165645465 is about 12870.3327462813. The cubic root of 165645465 is about 549.1949268167.

The spelling of 165645465 in words is "one hundred sixty-five million, six hundred forty-five thousand, four hundred sixty-five".