6423555320 has 128 divisors (see below), whose sum is σ = 18054489600. Its totient is φ = 2002530816.

The previous prime is 6423555319. The next prime is 6423555323. The reversal of 6423555320 is 235553246.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423555323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230711 + ... + 257049.

It is an arithmetic number, because the mean of its divisors is an integer number (141050700).

Almost surely, 2^6423555320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6423555320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9027244800).

6423555320 is an abundant number, since it is smaller than the sum of its proper divisors (11630934280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6423555320 is a wasteful number, since it uses less digits than its factorization.

6423555320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26437 (or 26433 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

The square root of 6423555320 is about 80147.0855365309. The cubic root of 6423555320 is about 1858.9105386216.

The spelling of 6423555320 in words is "six billion, four hundred twenty-three million, five hundred fifty-five thousand, three hundred twenty".