276731151561 has 12 divisors (see below), whose sum is σ = 423235879092. Its totient is φ = 173635232256.

The previous prime is 276731151511. The next prime is 276731151617. The reversal of 276731151561 is 165151137672.

276731151561 is a `hidden beast` number, since 2 + 7 + 6 + 7 + 31 + 1 + 51 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 132255141561 + 144476010000 = 363669^2 + 380100^2 .

It is not a de Polignac number, because 276731151561 - 2¹³ = 276731143369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (276731151511) 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, 904350016 + ... + 904350321.

It is an arithmetic number, because the mean of its divisors is an integer number (35269656591).

Almost surely, 2^276731151561 is an apocalyptic number.

It is an amenable number.

276731151561 is a deficient number, since it is larger than the sum of its proper divisors (146504727531).

276731151561 is a wasteful number, since it uses less digits than its factorization.

276731151561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808700360 (or 1808700357 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The spelling of 276731151561 in words is "two hundred seventy-six billion, seven hundred thirty-one million, one hundred fifty-one thousand, five hundred sixty-one".