11561403116 has 12 divisors (see below), whose sum is σ = 20256867120. Its totient is φ = 5773726800.

The previous prime is 11561403103. The next prime is 11561403127. The reversal of 11561403116 is 61130416511.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739960 + ... + 1746591.

It is an arithmetic number, because the mean of its divisors is an integer number (1688072260).

Almost surely, 2^11561403116 is an apocalyptic number.

It is an amenable number.

11561403116 is a deficient number, since it is larger than the sum of its proper divisors (8695464004).

11561403116 is a wasteful number, since it uses less digits than its factorization.

11561403116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487384 (or 3487382 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 11561403116 its reverse (61130416511), we get a palindrome (72691819627).

The spelling of 11561403116 in words is "eleven billion, five hundred sixty-one million, four hundred three thousand, one hundred sixteen".