4602561661 has 16 divisors (see below), whose sum is σ = 4804034560. Its totient is φ = 4404637440.

The previous prime is 4602561659. The next prime is 4602561673. The reversal of 4602561661 is 1661652064.

It is a cyclic number.

It is not a de Polignac number, because 4602561661 - 2¹ = 4602561659 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 4602561661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4602561961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1325035 + ... + 1328503.

It is an arithmetic number, because the mean of its divisors is an integer number (300252160).

Almost surely, 2^4602561661 is an apocalyptic number.

It is an amenable number.

4602561661 is a deficient number, since it is larger than the sum of its proper divisors (201472899).

4602561661 is a wasteful number, since it uses less digits than its factorization.

4602561661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 4602561661 is about 67842.1820182694. The cubic root of 4602561661 is about 1663.4121594774.

The spelling of 4602561661 in words is "four billion, six hundred two million, five hundred sixty-one thousand, six hundred sixty-one".