1616091008 has 128 divisors (see below), whose sum is σ = 3849431040. Its totient is φ = 661248000.

The previous prime is 1616090981. The next prime is 1616091011. The reversal of 1616091008 is 8001906161.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×1616091008² = 5223500292276912128, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2305058 + ... + 2305758.

It is an arithmetic number, because the mean of its divisors is an integer number (30073680).

Almost surely, 2^1616091008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1616091008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1924715520).

1616091008 is an abundant number, since it is smaller than the sum of its proper divisors (2233340032).

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

1616091008 is an equidigital number, since it uses as much as digits as its factorization.

1616091008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 1616091008 is about 40200.6344228546. The cubic root of 1616091008 is about 1173.5148904083.

Adding to 1616091008 its reverse (8001906161), we get a palindrome (9617997169).

The spelling of 1616091008 in words is "one billion, six hundred sixteen million, ninety-one thousand, eight".