4065541261 has 8 divisors (see below), whose sum is σ = 4142698560. Its totient is φ = 3988659072.

The previous prime is 4065541247. The next prime is 4065541267. The reversal of 4065541261 is 1621455604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4065541261 - 2⁵ = 4065541229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4065541267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38820 + ... + 98173.

It is an arithmetic number, because the mean of its divisors is an integer number (517837320).

Almost surely, 2^4065541261 is an apocalyptic number.

It is an amenable number.

4065541261 is a deficient number, since it is larger than the sum of its proper divisors (77157299).

4065541261 is a wasteful number, since it uses less digits than its factorization.

4065541261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137555.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 4065541261 is about 63761.5970706506. The cubic root of 4065541261 is about 1596.0241469128.

Adding to 4065541261 its reverse (1621455604), we get a palindrome (5686996865).

The spelling of 4065541261 in words is "four billion, sixty-five million, five hundred forty-one thousand, two hundred sixty-one".