16561116110 has 64 divisors (see below), whose sum is σ = 39121850880. Its totient is φ = 4890222720.

The previous prime is 16561116107. The next prime is 16561116137. The reversal of 16561116110 is 1161116561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 551369 + ... + 580628.

It is an arithmetic number, because the mean of its divisors is an integer number (611278920).

Almost surely, 2^16561116110 is an apocalyptic number.

16561116110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16561116110 is an abundant number, since it is smaller than the sum of its proper divisors (22560734770).

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

16561116110 is a wasteful number, since it uses less digits than its factorization.

16561116110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132041.

The product of its (nonzero) digits is 1080, while the sum is 29.

The spelling of 16561116110 in words is "sixteen billion, five hundred sixty-one million, one hundred sixteen thousand, one hundred ten".