9236781561 has 16 divisors (see below), whose sum is σ = 14560444800. Its totient is φ = 5096155008.

The previous prime is 9236781559. The next prime is 9236781569. The reversal of 9236781561 is 1651876329.

9236781561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9236781561 - 2¹ = 9236781559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9236781561.

It is not an unprimeable number, because it can be changed into a prime (9236781569) 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 15 ways as a sum of consecutive naturals, for example, 7582956 + ... + 7584173.

It is an arithmetic number, because the mean of its divisors is an integer number (910027800).

Almost surely, 2^9236781561 is an apocalyptic number.

It is an amenable number.

9236781561 is a deficient number, since it is larger than the sum of its proper divisors (5323663239).

9236781561 is a wasteful number, since it uses less digits than its factorization.

9236781561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15167168.

The product of its digits is 544320, while the sum is 48.

The square root of 9236781561 is about 96108.1763483212. The cubic root of 9236781561 is about 2098.1678321288.

The spelling of 9236781561 in words is "nine billion, two hundred thirty-six million, seven hundred eighty-one thousand, five hundred sixty-one".