6418603321 has 24 divisors (see below), whose sum is σ = 7221939480. Its totient is φ = 5664121344.

The previous prime is 6418603309. The next prime is 6418603337. The reversal of 6418603321 is 1233068146.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 237498921 + 6181104400 = 15411^2 + 78620^2 .

It is not a de Polignac number, because 6418603321 - 2⁹ = 6418602809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6418603361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4478421 + ... + 4479853.

It is an arithmetic number, because the mean of its divisors is an integer number (300914145).

Almost surely, 2^6418603321 is an apocalyptic number.

It is an amenable number.

6418603321 is a deficient number, since it is larger than the sum of its proper divisors (803336159).

6418603321 is a wasteful number, since it uses less digits than its factorization.

6418603321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 6418603321 is about 80116.1863857735. The cubic root of 6418603321 is about 1858.4327300362.

The spelling of 6418603321 in words is "six billion, four hundred eighteen million, six hundred three thousand, three hundred twenty-one".