1649395505 has 32 divisors (see below), whose sum is σ = 2170675584. Its totient is φ = 1198181376.

The previous prime is 1649395483. The next prime is 1649395511. The reversal of 1649395505 is 5055939461.

It is a cyclic number.

It is not a de Polignac number, because 1649395505 - 2⁶ = 1649395441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1649395505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300647 + ... + 306083.

It is an arithmetic number, because the mean of its divisors is an integer number (67833612).

Almost surely, 2^1649395505 is an apocalyptic number.

It is an amenable number.

1649395505 is a deficient number, since it is larger than the sum of its proper divisors (521280079).

1649395505 is a wasteful number, since it uses less digits than its factorization.

1649395505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5585.

The product of its (nonzero) digits is 729000, while the sum is 47.

The square root of 1649395505 is about 40612.7505224652. The cubic root of 1649395505 is about 1181.5214275812.

The spelling of 1649395505 in words is "one billion, six hundred forty-nine million, three hundred ninety-five thousand, five hundred five".