276868549489 has 9 divisors (see below), whose sum is σ = 322075862667. Its totient is φ = 237312742464.

The previous prime is 276868549481. The next prime is 276868549493. The reversal of 276868549489 is 984945868672.

It is a happy number.

The square root of 276868549489 is 526183.

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., 176582327089 + 100286222400 = 420217^2 + 316680^2 .

It is not a de Polignac number, because 276868549489 - 2³ = 276868549481 is a prime.

It is a super-2 number, since 2×276868549489² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (276868549481) 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 8 ways as a sum of consecutive naturals, for example, 3645697 + ... + 3720865.

It is an arithmetic number, because the mean of its divisors is an integer number (35786206963).

Almost surely, 2^276868549489 is an apocalyptic number.

276868549489 is the 526183-rd square number.

276868549489 is the 263092-nd centered octagonal number.

It is an amenable number.

276868549489 is a deficient number, since it is larger than the sum of its proper divisors (45207313178).

276868549489 is an frugal number, since it uses more digits than its factorization.

276868549489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150352 (or 75176 counting only the distinct ones).

The product of its digits is 1672151040, while the sum is 76.

The spelling of 276868549489 in words is "two hundred seventy-six billion, eight hundred sixty-eight million, five hundred forty-nine thousand, four hundred eighty-nine".