11161265616 has 80 divisors (see below), whose sum is σ = 32056489920. Its totient is φ = 3718154880.

The previous prime is 11161265611. The next prime is 11161265623. The reversal of 11161265616 is 61656216111.

11161265616 is a `hidden beast` number, since 1 + 1 + 16 + 1 + 26 + 5 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11161265611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797011 + ... + 810893.

It is an arithmetic number, because the mean of its divisors is an integer number (400706124).

Almost surely, 2^11161265616 is an apocalyptic number.

11161265616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11161265616 is an abundant number, since it is smaller than the sum of its proper divisors (20895224304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11161265616 is a wasteful number, since it uses less digits than its factorization.

11161265616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15761 (or 15749 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The spelling of 11161265616 in words is "eleven billion, one hundred sixty-one million, two hundred sixty-five thousand, six hundred sixteen".