276681440209 has 4 divisors (see below), whose sum is σ = 276711435504. Its totient is φ = 276651444916.

The previous prime is 276681440207. The next prime is 276681440293. The reversal of 276681440209 is 902044186672.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 276681440209 - 2¹ = 276681440207 is a prime.

It is a super-2 number, since 2×276681440209² (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 (276681440201) 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 3 ways as a sum of consecutive naturals, for example, 14983807 + ... + 15002260.

It is an arithmetic number, because the mean of its divisors is an integer number (69177858876).

Almost surely, 2^276681440209 is an apocalyptic number.

It is an amenable number.

276681440209 is a deficient number, since it is larger than the sum of its proper divisors (29995295).

276681440209 is an equidigital number, since it uses as much as digits as its factorization.

276681440209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29995294.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 276681440209 in words is "two hundred seventy-six billion, six hundred eighty-one million, four hundred forty thousand, two hundred nine".