4020065815 has 8 divisors (see below), whose sum is σ = 4849337088. Its totient is φ = 3199213920.

The previous prime is 4020065783. The next prime is 4020065827. The reversal of 4020065815 is 5185600204.

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

It is not a de Polignac number, because 4020065815 - 2⁵ = 4020065783 is a prime.

It is a super-2 number, since 2×4020065815² = 32321858313863228450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 2103792 + ... + 2105701.

It is an arithmetic number, because the mean of its divisors is an integer number (606167136).

Almost surely, 2^4020065815 is an apocalyptic number.

4020065815 is a deficient number, since it is larger than the sum of its proper divisors (829271273).

4020065815 is a wasteful number, since it uses less digits than its factorization.

4020065815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4209689.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 4020065815 is about 63403.9889518002. The cubic root of 4020065815 is about 1590.0510004342.

The spelling of 4020065815 in words is "four billion, twenty million, sixty-five thousand, eight hundred fifteen".