16516642212 has 144 divisors (see below), whose sum is σ = 48962938752. Its totient is φ = 4595996160.

The previous prime is 16516642169. The next prime is 16516642243. The reversal of 16516642212 is 21224661561.

16516642212 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 6 + 642 + 2 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8543598 + ... + 8545530.

It is an arithmetic number, because the mean of its divisors is an integer number (340020408).

Almost surely, 2^16516642212 is an apocalyptic number.

16516642212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16516642212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24481469376).

16516642212 is an abundant number, since it is smaller than the sum of its proper divisors (32446296540).

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

16516642212 is a wasteful number, since it uses less digits than its factorization.

16516642212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818 (or 2813 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 16516642212 in words is "sixteen billion, five hundred sixteen million, six hundred forty-two thousand, two hundred twelve".