6409957019 has 4 divisors (see below), whose sum is σ = 6434898744. Its totient is φ = 6385015296.

The previous prime is 6409956989. The next prime is 6409957033. The reversal of 6409957019 is 9107599046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6409957019 is a prime.

It is a super-2 number, since 2×6409957019² = 82175097970854732722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6409957919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12470477 + ... + 12470990.

It is an arithmetic number, because the mean of its divisors is an integer number (1608724686).

Almost surely, 2^6409957019 is an apocalyptic number.

6409957019 is a deficient number, since it is larger than the sum of its proper divisors (24941725).

6409957019 is a wasteful number, since it uses less digits than its factorization.

6409957019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24941724.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 6409957019 is about 80062.2071829150. The cubic root of 6409957019 is about 1857.5978759727.

The spelling of 6409957019 in words is "six billion, four hundred nine million, nine hundred fifty-seven thousand, nineteen".