6543945619 has 2 divisors, whose sum is σ = 6543945620. Its totient is φ = 6543945618.

The previous prime is 6543945581. The next prime is 6543945649. The reversal of 6543945619 is 9165493456.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6543945619 - 2⁷ = 6543945491 is a prime.

It is a super-2 number, since 2×6543945619² = 85646448528858586322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6543945649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271972809 + 3271972810.

It is an arithmetic number, because the mean of its divisors is an integer number (3271972810).

Almost surely, 2^6543945619 is an apocalyptic number.

6543945619 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543945619 is an equidigital number, since it uses as much as digits as its factorization.

6543945619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 52.

The square root of 6543945619 is about 80894.6575430047. The cubic root of 6543945619 is about 1870.4519691649.

The spelling of 6543945619 in words is "six billion, five hundred forty-three million, nine hundred forty-five thousand, six hundred nineteen".