16616213612 has 12 divisors (see below), whose sum is σ = 29350135080. Its totient is φ = 8230460736.

The previous prime is 16616213599. The next prime is 16616213617. The reversal of 16616213612 is 21631261661.

It is a super-2 number, since 2×16616213612² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16616213617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19411037 + ... + 19411892.

It is an arithmetic number, because the mean of its divisors is an integer number (2445844590).

Almost surely, 2^16616213612 is an apocalyptic number.

It is an amenable number.

16616213612 is a deficient number, since it is larger than the sum of its proper divisors (12733921468).

16616213612 is a wasteful number, since it uses less digits than its factorization.

16616213612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38823040 (or 38823038 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The spelling of 16616213612 in words is "sixteen billion, six hundred sixteen million, two hundred thirteen thousand, six hundred twelve".