16161604220 has 12 divisors (see below), whose sum is σ = 33939368904. Its totient is φ = 6464641680.

The previous prime is 16161604187. The next prime is 16161604241. The reversal of 16161604220 is 2240616161.

16161604220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16161604220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404040086 + ... + 404040125.

It is an arithmetic number, because the mean of its divisors is an integer number (2828280742).

Almost surely, 2^16161604220 is an apocalyptic number.

16161604220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16161604220 is an abundant number, since it is smaller than the sum of its proper divisors (17777764684).

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

16161604220 is a wasteful number, since it uses less digits than its factorization.

16161604220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808080220 (or 808080218 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 16161604220 in words is "sixteen billion, one hundred sixty-one million, six hundred four thousand, two hundred twenty".