276320561 has 12 divisors (see below), whose sum is σ = 304408272. Its totient is φ = 250635000.

The previous prime is 276320531. The next prime is 276320581. The reversal of 276320561 is 165023672.

It is not a de Polignac number, because 276320561 - 2¹⁴ = 276304177 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (276320501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57086 + ... + 61736.

It is an arithmetic number, because the mean of its divisors is an integer number (25367356).

Almost surely, 2^276320561 is an apocalyptic number.

It is an amenable number.

276320561 is a deficient number, since it is larger than the sum of its proper divisors (28087711).

276320561 is a wasteful number, since it uses less digits than its factorization.

276320561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164 (or 5153 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 276320561 is about 16622.8926784721. The cubic root of 276320561 is about 651.3349770427.

The spelling of 276320561 in words is "two hundred seventy-six million, three hundred twenty thousand, five hundred sixty-one".