6409355811 has 4 divisors (see below), whose sum is σ = 8545807752. Its totient is φ = 4272903872.

The previous prime is 6409355767. The next prime is 6409355857. The reversal of 6409355811 is 1185539046.

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

It is a cyclic number.

It is not a de Polignac number, because 6409355811 - 2⁷ = 6409355683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6409355891) 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, 1068225966 + ... + 1068225971.

It is an arithmetic number, because the mean of its divisors is an integer number (2136451938).

Almost surely, 2^6409355811 is an apocalyptic number.

6409355811 is a deficient number, since it is larger than the sum of its proper divisors (2136451941).

6409355811 is a wasteful number, since it uses less digits than its factorization.

6409355811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136451940.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 6409355811 is about 80058.4524644338. The cubic root of 6409355811 is about 1857.5397977038.

The spelling of 6409355811 in words is "six billion, four hundred nine million, three hundred fifty-five thousand, eight hundred eleven".