2065145645 has 4 divisors (see below), whose sum is σ = 2478174780. Its totient is φ = 1652116512.

The previous prime is 2065145609. The next prime is 2065145699. The reversal of 2065145645 is 5465415602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1144265929 + 920879716 = 33827^2 + 30346^2 .

It is a cyclic number.

It is not a de Polignac number, because 2065145645 - 2²² = 2060951341 is a prime.

It is a super-3 number, since 3×2065145645³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2065145599 and 2065145608.

It is a congruent 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, 206514560 + ... + 206514569.

It is an arithmetic number, because the mean of its divisors is an integer number (619543695).

Almost surely, 2^2065145645 is an apocalyptic number.

It is an amenable number.

2065145645 is a deficient number, since it is larger than the sum of its proper divisors (413029135).

2065145645 is an equidigital number, since it uses as much as digits as its factorization.

2065145645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413029134.

The product of its (nonzero) digits is 144000, while the sum is 38.

The square root of 2065145645 is about 45443.8735694923. The cubic root of 2065145645 is about 1273.4548797944.

The spelling of 2065145645 in words is "two billion, sixty-five million, one hundred forty-five thousand, six hundred forty-five".