6421788252199 has 2 divisors, whose sum is σ = 6421788252200. Its totient is φ = 6421788252198.

The previous prime is 6421788252149. The next prime is 6421788252223. The reversal of 6421788252199 is 9912528871246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6421788252199 - 2⁹ = 6421788251687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6421788252199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6421788252149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210894126099 + 3210894126100.

It is an arithmetic number, because the mean of its divisors is an integer number (3210894126100).

Almost surely, 2^{6421788252199} is an apocalyptic number.

6421788252199 is a deficient number, since it is larger than the sum of its proper divisors (1).

6421788252199 is an equidigital number, since it uses as much as digits as its factorization.

6421788252199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34836480, while the sum is 64.

The spelling of 6421788252199 in words is "six trillion, four hundred twenty-one billion, seven hundred eighty-eight million, two hundred fifty-two thousand, one hundred ninety-nine".