6445553430 has 64 divisors (see below), whose sum is σ = 15759479808. Its totient is φ = 1686769920.

The previous prime is 6445553399. The next prime is 6445553431. The reversal of 6445553430 is 343555446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445553431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 538794 + ... + 550626.

It is an arithmetic number, because the mean of its divisors is an integer number (246241872).

Almost surely, 2^6445553430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6445553430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7879739904).

6445553430 is an abundant number, since it is smaller than the sum of its proper divisors (9313926378).

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

6445553430 is a wasteful number, since it uses less digits than its factorization.

6445553430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12181.

The product of its (nonzero) digits is 432000, while the sum is 39.

The square root of 6445553430 is about 80284.2041126397. The cubic root of 6445553430 is about 1861.0301294559.

The spelling of 6445553430 in words is "six billion, four hundred forty-five million, five hundred fifty-three thousand, four hundred thirty".