2065540465 has 8 divisors (see below), whose sum is σ = 2484028008. Its totient is φ = 1648846080.

The previous prime is 2065540427. The next prime is 2065540487. The reversal of 2065540465 is 5640455602.

It can be written as a sum of positive squares in 4 ways, for example, as 1382976 + 2064157489 = 1176^2 + 45433^2 .

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

It is not a de Polignac number, because 2065540465 - 2¹¹ = 2065538417 is a prime.

It is a Duffinian 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, 445752 + ... + 450361.

It is an arithmetic number, because the mean of its divisors is an integer number (310503501).

Almost surely, 2^2065540465 is an apocalyptic number.

It is an amenable number.

2065540465 is a deficient number, since it is larger than the sum of its proper divisors (418487543).

2065540465 is an equidigital number, since it uses as much as digits as its factorization.

2065540465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896579.

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 2065540465 is about 45448.2174017860. The cubic root of 2065540465 is about 1273.5360287792.

The spelling of 2065540465 in words is "two billion, sixty-five million, five hundred forty thousand, four hundred sixty-five".