11616071805 has 24 divisors (see below), whose sum is σ = 21683335128. Its totient is φ = 5718681216.

The previous prime is 11616071801. The next prime is 11616071813. The reversal of 11616071805 is 50817061611.

It can be written as a sum of positive squares in 4 ways, for example, as 40678884 + 11575392921 = 6378^2 + 107589^2 .

It is not a de Polignac number, because 11616071805 - 2² = 11616071801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11616071805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11616071801) 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 23 ways as a sum of consecutive naturals, for example, 9927682 + ... + 9928851.

It is an arithmetic number, because the mean of its divisors is an integer number (903472297).

Almost surely, 2^11616071805 is an apocalyptic number.

11616071805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11616071805 is a deficient number, since it is larger than the sum of its proper divisors (10067263323).

11616071805 is a wasteful number, since it uses less digits than its factorization.

11616071805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19856557 (or 19856554 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The spelling of 11616071805 in words is "eleven billion, six hundred sixteen million, seventy-one thousand, eight hundred five".