6420769019 has 4 divisors (see below), whose sum is σ = 7338021744. Its totient is φ = 5503516296.

The previous prime is 6420769013. The next prime is 6420769027. The reversal of 6420769019 is 9109670246.

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 6420769019 - 2³² = 2125801723 is a prime.

It is a super-2 number, since 2×6420769019² = 82452549590700444722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420769013) 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, 458626352 + ... + 458626365.

It is an arithmetic number, because the mean of its divisors is an integer number (1834505436).

Almost surely, 2^6420769019 is an apocalyptic number.

6420769019 is a deficient number, since it is larger than the sum of its proper divisors (917252725).

6420769019 is an equidigital number, since it uses as much as digits as its factorization.

6420769019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917252724.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 6420769019 is about 80129.7012286955. The cubic root of 6420769019 is about 1858.6417241772.

The spelling of 6420769019 in words is "six billion, four hundred twenty million, seven hundred sixty-nine thousand, nineteen".