1646245465 has 16 divisors (see below), whose sum is σ = 2047038480. Its totient is φ = 1269452800.

The previous prime is 1646245457. The next prime is 1646245487. The reversal of 1646245465 is 5645426461.

It can be written as a sum of positive squares in 8 ways, for example, as 238795209 + 1407450256 = 15453^2 + 37516^2 .

It is not a de Polignac number, because 1646245465 - 2³ = 1646245457 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 80265 + ... + 98665.

It is an arithmetic number, because the mean of its divisors is an integer number (127939905).

Almost surely, 2^1646245465 is an apocalyptic number.

It is an amenable number.

1646245465 is a deficient number, since it is larger than the sum of its proper divisors (400793015).

1646245465 is a wasteful number, since it uses less digits than its factorization.

1646245465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19052.

The product of its digits is 691200, while the sum is 43.

The square root of 1646245465 is about 40573.9505717646. The cubic root of 1646245465 is about 1180.7687858598.

The spelling of 1646245465 in words is "one billion, six hundred forty-six million, two hundred forty-five thousand, four hundred sixty-five".