3161204640 has 288 divisors, whose sum is σ = 12281383296. Its totient is φ = 732948480.

The previous prime is 3161204611. The next prime is 3161204681. The reversal of 3161204640 is 464021613.

3161204640 is a `hidden beast` number, since 3 + 1 + 6 + 12 + 0 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 359982 + ... + 368658.

It is an arithmetic number, because the mean of its divisors is an integer number (42643692).

Almost surely, 2^3161204640 is an apocalyptic number.

3161204640 is a gapful number since it is divisible by the number (30) 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 3161204640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6140691648).

3161204640 is an abundant number, since it is smaller than the sum of its proper divisors (9120178656).

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

3161204640 is a wasteful number, since it uses less digits than its factorization.

3161204640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8732 (or 8721 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 3161204640 is about 56224.5910612074. The cubic root of 3161204640 is about 1467.6332315599.

The spelling of 3161204640 in words is "three billion, one hundred sixty-one million, two hundred four thousand, six hundred forty".