16491612 has 12 divisors (see below), whose sum is σ = 38480456. Its totient is φ = 5497200.

The previous prime is 16491599. The next prime is 16491613. The reversal of 16491612 is 21619461.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 16491612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16491613) 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, 687139 + ... + 687162.

Almost surely, 2^16491612 is an apocalyptic number.

16491612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16491612 is an abundant number, since it is smaller than the sum of its proper divisors (21988844).

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

16491612 is a wasteful number, since it uses less digits than its factorization.

16491612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374308 (or 1374306 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 16491612 is about 4060.9865796380. The cubic root of 16491612 is about 254.5390210650.

The spelling of 16491612 in words is "sixteen million, four hundred ninety-one thousand, six hundred twelve".