261511041356 has 12 divisors (see below), whose sum is σ = 457735685400. Its totient is φ = 130729416960.

The previous prime is 261511041353. The next prime is 261511041373. The reversal of 261511041356 is 653140115162.

261511041356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261511041353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6503381 + ... + 6543468.

It is an arithmetic number, because the mean of its divisors is an integer number (38144640450).

Almost surely, 2^261511041356 is an apocalyptic number.

It is an amenable number.

261511041356 is a deficient number, since it is larger than the sum of its proper divisors (196224644044).

261511041356 is a wasteful number, since it uses less digits than its factorization.

261511041356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13051864 (or 13051862 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 261511041356 in words is "two hundred sixty-one billion, five hundred eleven million, forty-one thousand, three hundred fifty-six".