1636016128 has 112 divisors (see below), whose sum is σ = 3601638720. Its totient is φ = 739639296.

The previous prime is 1636016113. The next prime is 1636016149. The reversal of 1636016128 is 8216106361.

It is a happy number.

It is a super-2 number, since 2×1636016128² = 5353097542152224768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1636016093 and 1636016102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3579676 + ... + 3580132.

Almost surely, 2^1636016128 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 1636016128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1800819360).

1636016128 is an abundant number, since it is smaller than the sum of its proper divisors (1965622592).

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

1636016128 is an equidigital number, since it uses as much as digits as its factorization.

1636016128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1636016128 is about 40447.6962013908. The cubic root of 1636016128 is about 1178.3180403475.

The spelling of 1636016128 in words is "one billion, six hundred thirty-six million, sixteen thousand, one hundred twenty-eight".