6426219409 has 4 divisors (see below), whose sum is σ = 6575666416. Its totient is φ = 6276772404.

The previous prime is 6426219403. The next prime is 6426219413. The reversal of 6426219409 is 9049126246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6426219409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 149446963 = 6426219409 / (6 + 4 + 2 + 6 + 2 + 1 + 9 + 4 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6426219403) 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, 74723439 + ... + 74723524.

It is an arithmetic number, because the mean of its divisors is an integer number (1643916604).

Almost surely, 2^6426219409 is an apocalyptic number.

It is an amenable number.

6426219409 is a deficient number, since it is larger than the sum of its proper divisors (149447007).

6426219409 is a wasteful number, since it uses less digits than its factorization.

6426219409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149447006.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 6426219409 is about 80163.7038128853. The cubic root of 6426219409 is about 1859.1674897124.

The spelling of 6426219409 in words is "six billion, four hundred twenty-six million, two hundred nineteen thousand, four hundred nine".