276065125561 has 27 divisors (see below), whose sum is σ = 303328878957. Its totient is φ = 251192315520.

The previous prime is 276065125537. The next prime is 276065125703. The reversal of 276065125561 is 165521560672.

The square root of 276065125561 is 525419.

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

It can be written as a sum of positive squares in 4 ways, for example, as 114155461161 + 161909664400 = 337869^2 + 402380^2 .

It is not a de Polignac number, because 276065125561 - 2⁵ = 276065125529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (276065725561) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 276895315 + ... + 276896311.

Almost surely, 2^276065125561 is an apocalyptic number.

276065125561 is the 525419-th square number.

276065125561 is the 262710-th centered octagonal number.

It is an amenable number.

276065125561 is a deficient number, since it is larger than the sum of its proper divisors (27263753396).

276065125561 is an frugal number, since it uses more digits than its factorization.

276065125561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 276065125561 in words is "two hundred seventy-six billion, sixty-five million, one hundred twenty-five thousand, five hundred sixty-one".