23306561613 has 12 divisors (see below), whose sum is σ = 33684617148. Its totient is φ = 15528669120.

The previous prime is 23306561611. The next prime is 23306561651. The reversal of 23306561613 is 31616560332.

23306561613 is a `hidden beast` number, since 2 + 3 + 30 + 6 + 5 + 6 + 1 + 613 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16217258409 + 7089303204 = 127347^2 + 84198^2 .

It is not a de Polignac number, because 23306561613 - 2¹ = 23306561611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23306561611) 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 11 ways as a sum of consecutive naturals, for example, 736870 + ... + 767847.

It is an arithmetic number, because the mean of its divisors is an integer number (2807051429).

Almost surely, 2^23306561613 is an apocalyptic number.

It is an amenable number.

23306561613 is a deficient number, since it is larger than the sum of its proper divisors (10378055535).

23306561613 is a wasteful number, since it uses less digits than its factorization.

23306561613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506444 (or 1506441 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 23306561613 in words is "twenty-three billion, three hundred six million, five hundred sixty-one thousand, six hundred thirteen".