16001616 has 20 divisors (see below), whose sum is σ = 41337632. Its totient is φ = 5333856.

The previous prime is 16001599. The next prime is 16001659. The reversal of 16001616 is 61610061.

It is a super-2 number, since 2×16001616² = 512103429222912, which contains 22 as substring.

16001616 is a modest number, since divided by 1616 gives 1600 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 16001592 and 16001601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166636 + ... + 166731.

Almost surely, 2^16001616 is an apocalyptic number.

16001616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16001616 is an abundant number, since it is smaller than the sum of its proper divisors (25336016).

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

16001616 is a wasteful number, since it uses less digits than its factorization.

16001616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333378 (or 333372 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 16001616 is about 4000.2019948998. The cubic root of 16001616 is about 251.9926931618.

Adding to 16001616 its reverse (61610061), we get a palindrome (77611677).

The spelling of 16001616 in words is "sixteen million, one thousand, six hundred sixteen".