4011609856 has 144 divisors (see below), whose sum is σ = 8581513248. Its totient is φ = 1869004800.

The previous prime is 4011609853. The next prime is 4011609869. The reversal of 4011609856 is 6589061104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4011609853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30622911 + ... + 30623041.

It is an arithmetic number, because the mean of its divisors is an integer number (59593842).

Almost surely, 2^4011609856 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 4011609856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4290756624).

4011609856 is an abundant number, since it is smaller than the sum of its proper divisors (4569903392).

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

4011609856 is a wasteful number, since it uses less digits than its factorization.

4011609856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 4011609856 is about 63337.2706705933. The cubic root of 4011609856 is about 1588.9353599686.

The spelling of 4011609856 in words is "four billion, eleven million, six hundred nine thousand, eight hundred fifty-six".