3874522581 has 12 divisors (see below), whose sum is σ = 5925740652. Its totient is φ = 2431072896.

The previous prime is 3874522559. The next prime is 3874522609. The reversal of 3874522581 is 1852254783.

3874522581 is a `hidden beast` number, since 3 + 8 + 7 + 45 + 22 + 581 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3547274481 + 327248100 = 59559^2 + 18090^2 .

It is not a de Polignac number, because 3874522581 - 2⁵ = 3874522549 is a prime.

It is a super-2 number, since 2×3874522581² = 30023850461357803122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3874522511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12661686 + ... + 12661991.

It is an arithmetic number, because the mean of its divisors is an integer number (493811721).

Almost surely, 2^3874522581 is an apocalyptic number.

It is an amenable number.

3874522581 is a deficient number, since it is larger than the sum of its proper divisors (2051218071).

3874522581 is a wasteful number, since it uses less digits than its factorization.

3874522581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25323700 (or 25323697 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 3874522581 is about 62245.6631501344. The cubic root of 3874522581 is about 1570.6258179632.

The spelling of 3874522581 in words is "three billion, eight hundred seventy-four million, five hundred twenty-two thousand, five hundred eighty-one".