3516112561 has 4 divisors (see below), whose sum is σ = 3786582772. Its totient is φ = 3245642352.

The previous prime is 3516112547. The next prime is 3516112571. The reversal of 3516112561 is 1652116153.

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 1516323600 + 1999788961 = 38940^2 + 44719^2 .

It is a cyclic number.

It is not a de Polignac number, because 3516112561 - 2⁹ = 3516112049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3516112531) 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 3 ways as a sum of consecutive naturals, for example, 135235086 + ... + 135235111.

It is an arithmetic number, because the mean of its divisors is an integer number (946645693).

Almost surely, 2^3516112561 is an apocalyptic number.

It is an amenable number.

3516112561 is a deficient number, since it is larger than the sum of its proper divisors (270470211).

3516112561 is a wasteful number, since it uses less digits than its factorization.

3516112561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270470210.

The product of its digits is 5400, while the sum is 31.

The square root of 3516112561 is about 59296.8174609734. The cubic root of 3516112561 is about 1520.6207876616.

The spelling of 3516112561 in words is "three billion, five hundred sixteen million, one hundred twelve thousand, five hundred sixty-one".