1649254465 has 32 divisors (see below), whose sum is σ = 2095163136. Its totient is φ = 1244678400.

The previous prime is 1649254457. The next prime is 1649254517. The reversal of 1649254465 is 5644529461.

It is not a de Polignac number, because 1649254465 - 2³ = 1649254457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1200519 + ... + 1201891.

It is an arithmetic number, because the mean of its divisors is an integer number (65473848).

Almost surely, 2^1649254465 is an apocalyptic number.

It is an amenable number.

1649254465 is a deficient number, since it is larger than the sum of its proper divisors (445908671).

1649254465 is a wasteful number, since it uses less digits than its factorization.

1649254465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609.

The product of its digits is 1036800, while the sum is 46.

The square root of 1649254465 is about 40611.0140848514. The cubic root of 1649254465 is about 1181.4877492766.

The spelling of 1649254465 in words is "one billion, six hundred forty-nine million, two hundred fifty-four thousand, four hundred sixty-five".