2489556975889 has 15 divisors (see below), whose sum is σ = 2533215331515. Its totient is φ = 2446650963120.

The previous prime is 2489556975887. The next prime is 2489556975977. The reversal of 2489556975889 is 9885796559842.

The square root of 2489556975889 is 1577833.

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

It can be written as a sum of positive squares in only one way, i.e., 15882300625 + 2473674675264 = 126025^2 + 1572792^2 .

It is not a de Polignac number, because 2489556975889 - 2¹ = 2489556975887 is a prime.

It is a Duffinian number.

Its product of digits (15676416000) is a multiple of the sum of its prime divisors (384).

It is not an unprimeable number, because it can be changed into a prime (2489556975883) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 7953855997 + ... + 7953856309.

It is an arithmetic number, because the mean of its divisors is an integer number (168881022101).

Almost surely, 2^{2489556975889} is an apocalyptic number.

2489556975889 is the 1577833-rd square number.

2489556975889 is the 788917-th centered octagonal number.

It is an amenable number.

2489556975889 is a deficient number, since it is larger than the sum of its proper divisors (43658355626).

2489556975889 is an frugal number, since it uses more digits than its factorization.

2489556975889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910 (or 384 counting only the distinct ones).

The product of its digits is 15676416000, while the sum is 85.

The spelling of 2489556975889 in words is "two trillion, four hundred eighty-nine billion, five hundred fifty-six million, nine hundred seventy-five thousand, eight hundred eighty-nine".