7324643640 has 128 divisors (see below), whose sum is σ = 23161593600. Its totient is φ = 1847946240.

The previous prime is 7324643633. The next prime is 7324643653. The reversal of 7324643640 is 463464237.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2171155 + ... + 2174525.

It is an arithmetic number, because the mean of its divisors is an integer number (180949950).

Almost surely, 2^7324643640 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 7324643640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11580796800).

7324643640 is an abundant number, since it is smaller than the sum of its proper divisors (15836949960).

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

7324643640 is a wasteful number, since it uses less digits than its factorization.

7324643640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357 (or 4353 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 39.

The square root of 7324643640 is about 85584.1319404479. The cubic root of 7324643640 is about 1942.0578687613.

It can be divided in two parts, 73246 and 43640, that added together give a triangular number (116886 = T₄₈₃).

The spelling of 7324643640 in words is "seven billion, three hundred twenty-four million, six hundred forty-three thousand, six hundred forty".