3261728261 has 8 divisors (see below), whose sum is σ = 3558743904. Its totient is φ = 2964795120.

The previous prime is 3261728219. The next prime is 3261728287. The reversal of 3261728261 is 1628271623.

It is a happy number.

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 3261728261 - 2²² = 3257533957 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 (3261728161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86066 + ... + 118028.

It is an arithmetic number, because the mean of its divisors is an integer number (444842988).

Almost surely, 2^3261728261 is an apocalyptic number.

It is an amenable number.

3261728261 is a deficient number, since it is larger than the sum of its proper divisors (297015643).

3261728261 is a wasteful number, since it uses less digits than its factorization.

3261728261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41251.

The product of its digits is 48384, while the sum is 38.

The square root of 3261728261 is about 57111.5422747451. The cubic root of 3261728261 is about 1483.0276863098.

Adding to 3261728261 its reverse (1628271623), we get a palindrome (4889999884).

It can be divided in two parts, 326172 and 8261, that added together give a palindrome (334433).

The spelling of 3261728261 in words is "three billion, two hundred sixty-one million, seven hundred twenty-eight thousand, two hundred sixty-one".