6421552043 has 2 divisors, whose sum is σ = 6421552044. Its totient is φ = 6421552042.

The previous prime is 6421552013. The next prime is 6421552063. The reversal of 6421552043 is 3402551246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6421552043 - 2¹² = 6421547947 is a prime.

It is not a weakly prime, because it can be changed into another prime (6421552013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210776021 + 3210776022.

It is an arithmetic number, because the mean of its divisors is an integer number (3210776022).

Almost surely, 2^6421552043 is an apocalyptic number.

6421552043 is a deficient number, since it is larger than the sum of its proper divisors (1).

6421552043 is an equidigital number, since it uses as much as digits as its factorization.

6421552043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 6421552043 is about 80134.5870582734. The cubic root of 6421552043 is about 1858.7172759746.

The spelling of 6421552043 in words is "six billion, four hundred twenty-one million, five hundred fifty-two thousand, forty-three".