6555443390 has 16 divisors (see below), whose sum is σ = 11999795760. Its totient is φ = 2577733440.

The previous prime is 6555443387. The next prime is 6555443399. The reversal of 6555443390 is 933445556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555443399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5554871 + ... + 5556050.

It is an arithmetic number, because the mean of its divisors is an integer number (749987235).

Almost surely, 2^6555443390 is an apocalyptic number.

6555443390 is a deficient number, since it is larger than the sum of its proper divisors (5444352370).

6555443390 is a wasteful number, since it uses less digits than its factorization.

6555443390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110987.

The product of its (nonzero) digits is 972000, while the sum is 44.

The square root of 6555443390 is about 80965.6926728846. The cubic root of 6555443390 is about 1871.5467951569.

The spelling of 6555443390 in words is "six billion, five hundred fifty-five million, four hundred forty-three thousand, three hundred ninety".