4987642289809 has 3 divisors (see below), whose sum is σ = 4987644523113. Its totient is φ = 4987640056506.

The previous prime is 4987642289789. The next prime is 4987642289813. The reversal of 4987642289809 is 9089822467894.

The square root of 4987642289809 is 2233303.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-4987642289809 is a prime.

It is a super-2 number, since 2×4987642289809² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4987642289009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1116652 + ... + 3349954.

It is an arithmetic number, because the mean of its divisors is an integer number (1662548174371).

Almost surely, 2^{4987642289809} is an apocalyptic number.

4987642289809 is the 2233303-rd square number.

4987642289809 is the 1116652-nd centered octagonal number.

It is an amenable number.

4987642289809 is a deficient number, since it is larger than the sum of its proper divisors (2233304).

4987642289809 is an frugal number, since it uses more digits than its factorization.

4987642289809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466606 (or 2233303 counting only the distinct ones).

The product of its (nonzero) digits is 1003290624, while the sum is 76.

The spelling of 4987642289809 in words is "four trillion, nine hundred eighty-seven billion, six hundred forty-two million, two hundred eighty-nine thousand, eight hundred nine".