3561046566 has 64 divisors (see below), whose sum is σ = 8891043840. Its totient is φ = 923744160.

The previous prime is 3561046549. The next prime is 3561046571. The reversal of 3561046566 is 6656401653.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 383025 + ... + 392211.

It is an arithmetic number, because the mean of its divisors is an integer number (138922560).

Almost surely, 2^3561046566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3561046566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4445521920).

3561046566 is an abundant number, since it is smaller than the sum of its proper divisors (5329997274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3561046566 is a wasteful number, since it uses less digits than its factorization.

3561046566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10049.

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 3561046566 is about 59674.5051592386. The cubic root of 3561046566 is about 1527.0709573503.

The spelling of 3561046566 in words is "three billion, five hundred sixty-one million, forty-six thousand, five hundred sixty-six".