6438145019 has 2 divisors, whose sum is σ = 6438145020. Its totient is φ = 6438145018.

The previous prime is 6438145009. The next prime is 6438145031. The reversal of 6438145019 is 9105418346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6438145019 - 2⁸ = 6438144763 is a prime.

It is a super-2 number, since 2×6438145019² = 82899422571349020722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6438145009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219072509 + 3219072510.

It is an arithmetic number, because the mean of its divisors is an integer number (3219072510).

Almost surely, 2^6438145019 is an apocalyptic number.

6438145019 is a deficient number, since it is larger than the sum of its proper divisors (1).

6438145019 is an equidigital number, since it uses as much as digits as its factorization.

6438145019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 6438145019 is about 80238.0521884723. The cubic root of 6438145019 is about 1860.3168438347.

The spelling of 6438145019 in words is "six billion, four hundred thirty-eight million, one hundred forty-five thousand, nineteen".