2640645300 has 144 divisors (see below), whose sum is σ = 7820124480. Its totient is φ = 687759360.

The previous prime is 2640645283. The next prime is 2640645307. The reversal of 2640645300 is 35460462.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640645307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3415714 + ... + 3416486.

It is an arithmetic number, because the mean of its divisors is an integer number (54306420).

Almost surely, 2^2640645300 is an apocalyptic number.

2640645300 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 2640645300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3910062240).

2640645300 is an abundant number, since it is smaller than the sum of its proper divisors (5179479180).

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

2640645300 is a wasteful number, since it uses less digits than its factorization.

2640645300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042 (or 1035 counting only the distinct ones).

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

The square root of 2640645300 is about 51387.2094980842. The cubic root of 2640645300 is about 1382.1972453161.

The spelling of 2640645300 in words is "two billion, six hundred forty million, six hundred forty-five thousand, three hundred".