1616951808 has 200 divisors, whose sum is σ = 4880020992. Its totient is φ = 532998144.

The previous prime is 1616951807. The next prime is 1616951867. The reversal of 1616951808 is 8081596161.

It is a super-2 number, since 2×1616951808² = 5229066298788937728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616951807) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5266791 + ... + 5267097.

Almost surely, 2^1616951808 is an apocalyptic number.

1616951808 is a gapful number since it is divisible by the number (18) 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 1616951808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440010496).

1616951808 is an abundant number, since it is smaller than the sum of its proper divisors (3263069184).

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

1616951808 is an equidigital number, since it uses as much as digits as its factorization.

1616951808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 1616951808 is about 40211.3392962731. The cubic root of 1616951808 is about 1173.7232083627.

The spelling of 1616951808 in words is "one billion, six hundred sixteen million, nine hundred fifty-one thousand, eight hundred eight".