3641581856 has 48 divisors (see below), whose sum is σ = 7937909280. Its totient is φ = 1630548480.

The previous prime is 3641581841. The next prime is 3641581901. The reversal of 3641581856 is 6581851463.

It is a super-2 number, since 2×3641581856² = 26522236827896809472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3641581856.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53621 + ... + 100788.

It is an arithmetic number, because the mean of its divisors is an integer number (165373110).

Almost surely, 2^3641581856 is an apocalyptic number.

It is an amenable number.

3641581856 is an abundant number, since it is smaller than the sum of its proper divisors (4296327424).

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

3641581856 is a wasteful number, since it uses less digits than its factorization.

3641581856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154497 (or 154489 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The square root of 3641581856 is about 60345.5205959813. The cubic root of 3641581856 is about 1538.4971362040.

The spelling of 3641581856 in words is "three billion, six hundred forty-one million, five hundred eighty-one thousand, eight hundred fifty-six".