3260390561 has 4 divisors (see below), whose sum is σ = 3339912324. Its totient is φ = 3180868800.

The previous prime is 3260390501. The next prime is 3260390587. The reversal of 3260390561 is 1650930623.

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 1620545536 + 1639845025 = 40256^2 + 40495^2 .

It is a cyclic number.

It is not a de Polignac number, because 3260390561 - 2¹⁰ = 3260389537 is a prime.

It is a super-2 number, since 2×3260390561² = 21260293220515789442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3260390501) 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, 39760820 + ... + 39760901.

It is an arithmetic number, because the mean of its divisors is an integer number (834978081).

Almost surely, 2^3260390561 is an apocalyptic number.

It is an amenable number.

3260390561 is a deficient number, since it is larger than the sum of its proper divisors (79521763).

3260390561 is an equidigital number, since it uses as much as digits as its factorization.

3260390561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79521762.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 3260390561 is about 57099.8297808321. The cubic root of 3260390561 is about 1482.8249188152.

The spelling of 3260390561 in words is "three billion, two hundred sixty million, three hundred ninety thousand, five hundred sixty-one".