16111550220 has 24 divisors (see below), whose sum is σ = 45112340784. Its totient is φ = 4296413376.

The previous prime is 16111550201. The next prime is 16111550303. The reversal of 16111550220 is 2205511161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134262859 + ... + 134262978.

It is an arithmetic number, because the mean of its divisors is an integer number (1879680866).

Almost surely, 2^16111550220 is an apocalyptic number.

16111550220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16111550220 is an abundant number, since it is smaller than the sum of its proper divisors (29000790564).

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

16111550220 is a wasteful number, since it uses less digits than its factorization.

16111550220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268525849 (or 268525847 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The spelling of 16111550220 in words is "sixteen billion, one hundred eleven million, five hundred fifty thousand, two hundred twenty".