2798731589481 has 27 divisors (see below), whose sum is σ = 4099285778679. Its totient is φ = 1840020963552.

The previous prime is 2798731589443. The next prime is 2798731589491. The reversal of 2798731589481 is 1849851378972.

The square root of 2798731589481 is 1672941.

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

2798731589481 is a `hidden beast` number, since 2 + 7 + 9 + 8 + 7 + 31 + 589 + 4 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1588696389225 + 1210035200256 = 1260435^2 + 1100016^2 .

It is not a de Polignac number, because 2798731589481 - 2⁴¹ = 599708333929 is a prime.

It is a super-2 number, since 2×2798731589481² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2798731589411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 366370260 + ... + 366377898.

Almost surely, 2^{2798731589481} is an apocalyptic number.

2798731589481 is the 1672941-st square number.

2798731589481 is the 836471-st centered octagonal number.

It is an amenable number.

2798731589481 is a deficient number, since it is larger than the sum of its proper divisors (1300554189198).

2798731589481 is an frugal number, since it uses more digits than its factorization.

2798731589481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15430 (or 7715 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 72.

The spelling of 2798731589481 in words is "two trillion, seven hundred ninety-eight billion, seven hundred thirty-one million, five hundred eighty-nine thousand, four hundred eighty-one".