6543780407 has 2 divisors, whose sum is σ = 6543780408. Its totient is φ = 6543780406.

The previous prime is 6543780401. The next prime is 6543780413. The reversal of 6543780407 is 7040873456.

It is a balanced prime because it is at equal distance from previous prime (6543780401) and next prime (6543780413).

It is a cyclic number.

It is not a de Polignac number, because 6543780407 - 2²² = 6539586103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6543780401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271890203 + 3271890204.

It is an arithmetic number, because the mean of its divisors is an integer number (3271890204).

Almost surely, 2^6543780407 is an apocalyptic number.

6543780407 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543780407 is an equidigital number, since it uses as much as digits as its factorization.

6543780407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 44.

The square root of 6543780407 is about 80893.6363813619. The cubic root of 6543780407 is about 1870.4362282175.

The spelling of 6543780407 in words is "six billion, five hundred forty-three million, seven hundred eighty thousand, four hundred seven".