10344720640 has 36 divisors (see below), whose sum is σ = 24778841724. Its totient is φ = 4137887744.

The previous prime is 10344720637. The next prime is 10344720647. The reversal of 10344720640 is 4602744301.

It can be written as a sum of positive squares in 2 ways, for example, as 6640294144 + 3704426496 = 81488^2 + 60864^2 .

It is not an unprimeable number, because it can be changed into a prime (10344720647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4039627 + ... + 4042186.

It is an arithmetic number, because the mean of its divisors is an integer number (688301159).

Almost surely, 2^10344720640 is an apocalyptic number.

10344720640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10344720640 is an abundant number, since it is smaller than the sum of its proper divisors (14434121084).

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

10344720640 is an frugal number, since it uses more digits than its factorization.

10344720640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8081834 (or 8081820 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 10344720640 in words is "ten billion, three hundred forty-four million, seven hundred twenty thousand, six hundred forty".