6540023040 has 144 divisors (see below), whose sum is σ = 21048261696. Its totient is φ = 1730560000.

The previous prime is 6540022991. The next prime is 6540023047. The reversal of 6540023040 is 403200456.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 6540023040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540023047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496540 + ... + 509540.

It is an arithmetic number, because the mean of its divisors is an integer number (146168484).

Almost surely, 2^6540023040 is an apocalyptic number.

6540023040 is a gapful number since it is divisible by the number (60) 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 6540023040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10524130848).

6540023040 is an abundant number, since it is smaller than the sum of its proper divisors (14508238656).

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

6540023040 is a wasteful number, since it uses less digits than its factorization.

6540023040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13156 (or 13142 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 6540023040 is about 80870.4089268751. The cubic root of 6540023040 is about 1870.0781650151.

Adding to 6540023040 its reverse (403200456), we get a palindrome (6943223496).

The spelling of 6540023040 in words is "six billion, five hundred forty million, twenty-three thousand, forty".