3561656143 has 4 divisors (see below), whose sum is σ = 3561820920. Its totient is φ = 3561491368.

The previous prime is 3561656129. The next prime is 3561656207. The reversal of 3561656143 is 3416561653.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3416561653 = 347 ⋅9845999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3561656143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3561656096 and 3561656105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561656843) 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, 44005 + ... + 95182.

It is an arithmetic number, because the mean of its divisors is an integer number (890455230).

Almost surely, 2^3561656143 is an apocalyptic number.

3561656143 is a deficient number, since it is larger than the sum of its proper divisors (164777).

3561656143 is a wasteful number, since it uses less digits than its factorization.

3561656143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164776.

The product of its digits is 194400, while the sum is 40.

The square root of 3561656143 is about 59679.6124568516. The cubic root of 3561656143 is about 1527.1580866259.

The spelling of 3561656143 in words is "three billion, five hundred sixty-one million, six hundred fifty-six thousand, one hundred forty-three".