6405836413 has 4 divisors (see below), whose sum is σ = 6406181020. Its totient is φ = 6405491808.

The previous prime is 6405836399. The next prime is 6405836417. The reversal of 6405836413 is 3146385046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1350342009 + 5055494404 = 36747^2 + 71102^2 .

It is a cyclic number.

It is not a de Polignac number, because 6405836413 - 2²¹ = 6403739261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405836417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142728 + ... + 182161.

It is an arithmetic number, because the mean of its divisors is an integer number (1601545255).

Almost surely, 2^6405836413 is an apocalyptic number.

It is an amenable number.

6405836413 is a deficient number, since it is larger than the sum of its proper divisors (344607).

6405836413 is a wasteful number, since it uses less digits than its factorization.

6405836413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344606.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 6405836413 is about 80036.4692687028. The cubic root of 6405836413 is about 1857.1997417513.

The spelling of 6405836413 in words is "six billion, four hundred five million, eight hundred thirty-six thousand, four hundred thirteen".