276036561 has 12 divisors (see below), whose sum is σ = 406243188. Its totient is φ = 180551904.

The previous prime is 276036533. The next prime is 276036611. The reversal of 276036561 is 165630672.

276036561 is a `hidden beast` number, since 2 + 7 + 60 + 36 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 151290000 + 124746561 = 12300^2 + 11169^2 .

It is a de Polignac number, because none of the positive numbers 2^k-276036561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (276036521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288870 + ... + 289823.

It is an arithmetic number, because the mean of its divisors is an integer number (33853599).

Almost surely, 2^276036561 is an apocalyptic number.

It is an amenable number.

276036561 is a deficient number, since it is larger than the sum of its proper divisors (130206627).

276036561 is a wasteful number, since it uses less digits than its factorization.

276036561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578752 (or 578749 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 276036561 is about 16614.3480461919. The cubic root of 276036561 is about 651.1117549725. Note that the first 3 decimals are identical.

The spelling of 276036561 in words is "two hundred seventy-six million, thirty-six thousand, five hundred sixty-one".