6540442301 has 4 divisors (see below), whose sum is σ = 6541343004. Its totient is φ = 6539541600.

The previous prime is 6540442273. The next prime is 6540442313. The reversal of 6540442301 is 1032440456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2330379076 + 4210063225 = 48274^2 + 64885^2 .

It is a cyclic number.

It is not a de Polignac number, because 6540442301 - 2¹⁰ = 6540441277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540442331) 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, 439370 + ... + 454011.

It is an arithmetic number, because the mean of its divisors is an integer number (1635335751).

Almost surely, 2^6540442301 is an apocalyptic number.

It is an amenable number.

6540442301 is a deficient number, since it is larger than the sum of its proper divisors (900703).

6540442301 is an equidigital number, since it uses as much as digits as its factorization.

6540442301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900702.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 6540442301 is about 80873.0010633957. The cubic root of 6540442301 is about 1870.1181258370.

Adding to 6540442301 its reverse (1032440456), we get a palindrome (7572882757).

The spelling of 6540442301 in words is "six billion, five hundred forty million, four hundred forty-two thousand, three hundred one".