4558557661 has 24 divisors (see below), whose sum is σ = 5377943160. Its totient is φ = 3852237312.

The previous prime is 4558557587. The next prime is 4558557671. The reversal of 4558557661 is 1667558554.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 75585636 + 4482972025 = 8694^2 + 66955^2 .

It is not a de Polignac number, because 4558557661 - 2⁹ = 4558557149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4558557599 and 4558557608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4558557671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1730001 + ... + 1732633.

It is an arithmetic number, because the mean of its divisors is an integer number (224080965).

Almost surely, 2^4558557661 is an apocalyptic number.

It is an amenable number.

4558557661 is a deficient number, since it is larger than the sum of its proper divisors (819385499).

4558557661 is a wasteful number, since it uses less digits than its factorization.

4558557661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133 (or 3126 counting only the distinct ones).

The product of its digits is 5040000, while the sum is 52.

The square root of 4558557661 is about 67517.0916213073. The cubic root of 4558557661 is about 1658.0940117850.

The spelling of 4558557661 in words is "four billion, five hundred fifty-eight million, five hundred fifty-seven thousand, six hundred sixty-one".