2065450643 has 4 divisors (see below), whose sum is σ = 2066726448. Its totient is φ = 2064174840.

The previous prime is 2065450627. The next prime is 2065450663. The reversal of 2065450643 is 3460545602.

It is a happy number.

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 2065450643 - 2⁴ = 2065450627 is a prime.

It is a super-2 number, since 2×2065450643² = 8532172717338226898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2065450603) 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, 635471 + ... + 638712.

It is an arithmetic number, because the mean of its divisors is an integer number (516681612).

Almost surely, 2^2065450643 is an apocalyptic number.

2065450643 is a deficient number, since it is larger than the sum of its proper divisors (1275805).

2065450643 is a wasteful number, since it uses less digits than its factorization.

2065450643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275804.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 2065450643 is about 45447.2292114712. The cubic root of 2065450643 is about 1273.5175682014.

The spelling of 2065450643 in words is "two billion, sixty-five million, four hundred fifty thousand, six hundred forty-three".