6505409001 has 32 divisors (see below), whose sum is σ = 10893433600. Its totient is φ = 3431417472.

The previous prime is 6505408981. The next prime is 6505409063. The reversal of 6505409001 is 1009045056.

It is not a de Polignac number, because 6505409001 - 2¹⁴ = 6505392617 is a prime.

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 6505409001.

It is not an unprimeable number, because it can be changed into a prime (6505409101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229780 + ... + 256533.

It is an arithmetic number, because the mean of its divisors is an integer number (340419800).

Almost surely, 2^6505409001 is an apocalyptic number.

It is an amenable number.

6505409001 is a deficient number, since it is larger than the sum of its proper divisors (4388024599).

6505409001 is a wasteful number, since it uses less digits than its factorization.

6505409001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486350 (or 486336 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 6505409001 is about 80656.1157073659. The cubic root of 6505409001 is about 1866.7731055626.

The spelling of 6505409001 in words is "six billion, five hundred five million, four hundred nine thousand, one".