6505145983 has 4 divisors (see below), whose sum is σ = 7434452560. Its totient is φ = 5575839408.

The previous prime is 6505145981. The next prime is 6505146001. The reversal of 6505145983 is 3895415056.

6505145983 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6505145983 - 2¹ = 6505145981 is a prime.

It is a super-3 number, since 3×6505145983³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6505145981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464653278 + ... + 464653291.

It is an arithmetic number, because the mean of its divisors is an integer number (1858613140).

Almost surely, 2^6505145983 is an apocalyptic number.

6505145983 is a deficient number, since it is larger than the sum of its proper divisors (929306577).

6505145983 is an equidigital number, since it uses as much as digits as its factorization.

6505145983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929306576.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 6505145983 is about 80654.4852007624. The cubic root of 6505145983 is about 1866.7479469320.

The spelling of 6505145983 in words is "six billion, five hundred five million, one hundred forty-five thousand, nine hundred eighty-three".