4988449561 has 2 divisors, whose sum is σ = 4988449562. Its totient is φ = 4988449560.

The previous prime is 4988449493. The next prime is 4988449591. The reversal of 4988449561 is 1659448894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4955456025 + 32993536 = 70395^2 + 5744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4988449561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4988449496 and 4988449505.

It is not a weakly prime, because it can be changed into another prime (4988449591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494224780 + 2494224781.

It is an arithmetic number, because the mean of its divisors is an integer number (2494224781).

Almost surely, 2^4988449561 is an apocalyptic number.

It is an amenable number.

4988449561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4988449561 is an equidigital number, since it uses as much as digits as its factorization.

4988449561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 58.

The square root of 4988449561 is about 70628.9569581769. The cubic root of 4988449561 is about 1708.6581999274.

The spelling of 4988449561 in words is "four billion, nine hundred eighty-eight million, four hundred forty-nine thousand, five hundred sixty-one".