6541162321 has 4 divisors (see below), whose sum is σ = 6664580532. Its totient is φ = 6417744112.

The previous prime is 6541162307. The next prime is 6541162343. The reversal of 6541162321 is 1232611456.

It is a happy number.

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 3012802321 + 3528360000 = 54889^2 + 59400^2 .

It is a cyclic number.

It is not a de Polignac number, because 6541162321 - 2³¹ = 4393678673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6541162361) 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, 61709026 + ... + 61709131.

It is an arithmetic number, because the mean of its divisors is an integer number (1666145133).

Almost surely, 2^6541162321 is an apocalyptic number.

It is an amenable number.

6541162321 is a deficient number, since it is larger than the sum of its proper divisors (123418211).

6541162321 is a wasteful number, since it uses less digits than its factorization.

6541162321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123418210.

The product of its digits is 8640, while the sum is 31.

The square root of 6541162321 is about 80877.4524883172. The cubic root of 6541162321 is about 1870.1867487722.

Adding to 6541162321 its reverse (1232611456), we get a palindrome (7773773777).

The spelling of 6541162321 in words is "six billion, five hundred forty-one million, one hundred sixty-two thousand, three hundred twenty-one".