6409278205 has 32 divisors (see below), whose sum is σ = 8892322560. Its totient is φ = 4382929920.

The previous prime is 6409278203. The next prime is 6409278209. The reversal of 6409278205 is 5028729046.

It is not a de Polignac number, because 6409278205 - 2¹ = 6409278203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6409278203) 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, 1230667 + ... + 1235863.

It is an arithmetic number, because the mean of its divisors is an integer number (277885080).

Almost surely, 2^6409278205 is an apocalyptic number.

It is an amenable number.

6409278205 is a deficient number, since it is larger than the sum of its proper divisors (2483044355).

6409278205 is a wasteful number, since it uses less digits than its factorization.

6409278205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6549.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 6409278205 is about 80057.9677796033. The cubic root of 6409278205 is about 1857.5323004961.

The spelling of 6409278205 in words is "six billion, four hundred nine million, two hundred seventy-eight thousand, two hundred five".