261543700315012 has 24 divisors (see below), whose sum is σ = 458299304832600. Its totient is φ = 130601129690880.

The previous prime is 261543700314991. The next prime is 261543700315043. The reversal of 261543700315012 is 210513007345162.

It can be written as a sum of positive squares in 4 ways, for example, as 76753824377476 + 184789875937536 = 8760926^2 + 13593744^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 918562 + ... + 22889542.

It is an arithmetic number, because the mean of its divisors is an integer number (19095804368025).

Almost surely, 2^{261543700315012} is an apocalyptic number.

It is an amenable number.

261543700315012 is a deficient number, since it is larger than the sum of its proper divisors (196755604517588).

261543700315012 is a wasteful number, since it uses less digits than its factorization.

261543700315012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21974871 (or 21974869 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 261543700315012 in words is "two hundred sixty-one trillion, five hundred forty-three billion, seven hundred million, three hundred fifteen thousand, twelve".