3640450000 has 120 divisors (see below), whose sum is σ = 9619071840. Its totient is φ = 1323600000.

The previous prime is 3640449977. The next prime is 3640450003. The reversal of 3640450000 is 540463.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640450003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 546691 + ... + 553309.

It is an arithmetic number, because the mean of its divisors is an integer number (80158932).

Almost surely, 2^3640450000 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 3640450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4809535920).

3640450000 is an abundant number, since it is smaller than the sum of its proper divisors (5978621840).

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

3640450000 is an equidigital number, since it uses as much as digits as its factorization.

3640450000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663 (or 6637 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 3640450000 is about 60336.1417394251. The cubic root of 3640450000 is about 1538.3377240101.

Adding to 3640450000 its reverse (540463), we get a palindrome (3640990463).

The spelling of 3640450000 in words is "three billion, six hundred forty million, four hundred fifty thousand".