6409949311 has 4 divisors (see below), whose sum is σ = 6425934624. Its totient is φ = 6393964000.

The previous prime is 6409949303. The next prime is 6409949317. The reversal of 6409949311 is 1139499046.

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 6409949311 - 2³ = 6409949303 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 (6409949317) 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, 7992055 + ... + 7992856.

It is an arithmetic number, because the mean of its divisors is an integer number (1606483656).

Almost surely, 2^6409949311 is an apocalyptic number.

6409949311 is a deficient number, since it is larger than the sum of its proper divisors (15985313).

6409949311 is a wasteful number, since it uses less digits than its factorization.

6409949311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15985312.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 6409949311 is about 80062.1590453318. The cubic root of 6409949311 is about 1857.5971313827.

The spelling of 6409949311 in words is "six billion, four hundred nine million, nine hundred forty-nine thousand, three hundred eleven".