2640322560 has 112 divisors (see below), whose sum is σ = 8448909696. Its totient is φ = 704053248.

The previous prime is 2640322523. The next prime is 2640322561. The reversal of 2640322560 is 652230462.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2640322561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112137 + ... + 133623.

Almost surely, 2^2640322560 is an apocalyptic number.

2640322560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2640322560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4224454848).

2640322560 is an abundant number, since it is smaller than the sum of its proper divisors (5808587136).

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

2640322560 is an equidigital number, since it uses as much as digits as its factorization.

2640322560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21521 (or 21497 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 2640322560 is about 51384.0691265299. The cubic root of 2640322560 is about 1382.1409322482.

The spelling of 2640322560 in words is "two billion, six hundred forty million, three hundred twenty-two thousand, five hundred sixty".