4561688989 has 12 divisors (see below), whose sum is σ = 5399788828. Its totient is φ = 3827989440.

The previous prime is 4561688981. The next prime is 4561689031. The reversal of 4561688989 is 9898861654.

It can be written as a sum of positive squares in 2 ways, for example, as 2242496025 + 2319192964 = 47355^2 + 48158^2 .

It is not a de Polignac number, because 4561688989 - 2³ = 4561688981 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 4561688989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4561688981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1448424 + ... + 1451569.

Almost surely, 2^4561688989 is an apocalyptic number.

It is an amenable number.

4561688989 is a deficient number, since it is larger than the sum of its proper divisors (838099839).

4561688989 is a wasteful number, since it uses less digits than its factorization.

4561688989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900028 (or 2900017 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 64.

The square root of 4561688989 is about 67540.2767909638. The cubic root of 4561688989 is about 1658.4735797845.

The spelling of 4561688989 in words is "four billion, five hundred sixty-one million, six hundred eighty-eight thousand, nine hundred eighty-nine".