4102065649 has 6 divisors (see below), whose sum is σ = 4508882210. Its totient is φ = 3729150480.

The previous prime is 4102065613. The next prime is 4102065659. The reversal of 4102065649 is 9465602014.

It can be written as a sum of positive squares in only one way, i.e., 2122260624 + 1979805025 = 46068^2 + 44495^2 .

It is not a de Polignac number, because 4102065649 - 2⁷ = 4102065521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4102065659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16950564 + ... + 16950805.

Almost surely, 2^4102065649 is an apocalyptic number.

It is an amenable number.

4102065649 is a deficient number, since it is larger than the sum of its proper divisors (406816561).

4102065649 is a wasteful number, since it uses less digits than its factorization.

4102065649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33901391 (or 33901380 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 4102065649 is about 64047.3703519512. The cubic root of 4102065649 is about 1600.7894085042.

The spelling of 4102065649 in words is "four billion, one hundred two million, sixty-five thousand, six hundred forty-nine".