272776561 has 8 divisors (see below), whose sum is σ = 274255520. Its totient is φ = 271302048.

The previous prime is 272776549. The next prime is 272776571. The reversal of 272776561 is 165677272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 272776561 - 2⁷ = 272776433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (272776541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241045 + ... + 242173.

It is an arithmetic number, because the mean of its divisors is an integer number (34281940).

Almost surely, 2^272776561 is an apocalyptic number.

It is an amenable number.

272776561 is a deficient number, since it is larger than the sum of its proper divisors (1478959).

272776561 is a wasteful number, since it uses less digits than its factorization.

272776561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223.

The product of its digits is 246960, while the sum is 43.

The square root of 272776561 is about 16515.9486860428. The cubic root of 272776561 is about 648.5383812863.

The spelling of 272776561 in words is "two hundred seventy-two million, seven hundred seventy-six thousand, five hundred sixty-one".