3245155561 has 4 divisors (see below), whose sum is σ = 3314201472. Its totient is φ = 3176109652.

The previous prime is 3245155549. The next prime is 3245155591. The reversal of 3245155561 is 1655515423.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1655515423 = 271 ⋅6108913.

It is a cyclic number.

It is not a de Polignac number, because 3245155561 - 2⁹ = 3245155049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3245155561.

It is not an unprimeable number, because it can be changed into a prime (3245155591) 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, 34522885 + ... + 34522978.

It is an arithmetic number, because the mean of its divisors is an integer number (828550368).

Almost surely, 2^3245155561 is an apocalyptic number.

It is an amenable number.

3245155561 is a deficient number, since it is larger than the sum of its proper divisors (69045911).

3245155561 is an equidigital number, since it uses as much as digits as its factorization.

3245155561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69045910.

The product of its digits is 90000, while the sum is 37.

The square root of 3245155561 is about 56966.2668690867. The cubic root of 3245155561 is about 1480.5116871148.

The spelling of 3245155561 in words is "three billion, two hundred forty-five million, one hundred fifty-five thousand, five hundred sixty-one".