216490172108 has 24 divisors (see below), whose sum is σ = 438911585952. Its totient is φ = 91510521984.

The previous prime is 216490172083. The next prime is 216490172111. The reversal of 216490172108 is 801271094612.

It is a super-2 number, since 2×216490172108² (a number of 23 digits) contains 22 as substring.

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, 52955435 + ... + 52959522.

It is an arithmetic number, because the mean of its divisors is an integer number (18287982748).

Almost surely, 2^216490172108 is an apocalyptic number.

216490172108 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216490172108 is an abundant number, since it is smaller than the sum of its proper divisors (222421413844).

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

216490172108 is a wasteful number, since it uses less digits than its factorization.

216490172108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105915041 (or 105915039 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 216490172108 in words is "two hundred sixteen billion, four hundred ninety million, one hundred seventy-two thousand, one hundred eight".