4020545065 has 32 divisors (see below), whose sum is σ = 5262768000. Its totient is φ = 2937005568.

The previous prime is 4020545057. The next prime is 4020545069. The reversal of 4020545065 is 5605450204.

It is a cyclic number.

It is not a de Polignac number, because 4020545065 - 2³ = 4020545057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4020545069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2497981 + ... + 2499589.

It is an arithmetic number, because the mean of its divisors is an integer number (164461500).

Almost surely, 2^4020545065 is an apocalyptic number.

It is an amenable number.

4020545065 is a deficient number, since it is larger than the sum of its proper divisors (1242222935).

4020545065 is a wasteful number, since it uses less digits than its factorization.

4020545065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 4020545065 is about 63407.7681755162. The cubic root of 4020545065 is about 1590.1141836172.

Adding to 4020545065 its reverse (5605450204), we get a palindrome (9625995269).

The spelling of 4020545065 in words is "four billion, twenty million, five hundred forty-five thousand, sixty-five".