3725338581 has 32 divisors (see below), whose sum is σ = 5643141120. Its totient is φ = 2427831792.

The previous prime is 3725338523. The next prime is 3725338633. The reversal of 3725338581 is 1858335273.

3725338581 is a `hidden beast` number, since 37 + 2 + 5 + 3 + 38 + 581 = 666.

It is not a de Polignac number, because 3725338581 - 2⁶ = 3725338517 is a prime.

It is a super-2 number, since 2×3725338581² = 27756295086174187122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3725338481) 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 31 ways as a sum of consecutive naturals, for example, 1804756 + ... + 1806818.

It is an arithmetic number, because the mean of its divisors is an integer number (176348160).

Almost surely, 2^3725338581 is an apocalyptic number.

It is an amenable number.

3725338581 is a deficient number, since it is larger than the sum of its proper divisors (1917802539).

3725338581 is a wasteful number, since it uses less digits than its factorization.

3725338581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542 (or 3536 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 3725338581 is about 61035.5517792704. The cubic root of 3725338581 is about 1550.2030370170.

The spelling of 3725338581 in words is "three billion, seven hundred twenty-five million, three hundred thirty-eight thousand, five hundred eighty-one".