3637581444 has 108 divisors (see below), whose sum is σ = 10985505804. Its totient is φ = 1011201408.

The previous prime is 3637581427. The next prime is 3637581449. The reversal of 3637581444 is 4441857363.

3637581444 is a `hidden beast` number, since 3 + 63 + 7 + 581 + 4 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3262694400 + 374887044 = 57120^2 + 19362^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3637581444.

It is not an unprimeable number, because it can be changed into a prime (3637581449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37402 + ... + 93134.

Almost surely, 2^3637581444 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 3637581444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5492752902).

3637581444 is an abundant number, since it is smaller than the sum of its proper divisors (7347924360).

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

3637581444 is a wasteful number, since it uses less digits than its factorization.

3637581444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55794 (or 55782 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 3637581444 is about 60312.3655977777. The cubic root of 3637581444 is about 1537.9335645000.

The spelling of 3637581444 in words is "three billion, six hundred thirty-seven million, five hundred eighty-one thousand, four hundred forty-four".