3581916925 has 12 divisors (see below), whose sum is σ = 4442629716. Its totient is φ = 2864854400.

The previous prime is 3581916901. The next prime is 3581916929. The reversal of 3581916925 is 5296191853.

It can be written as a sum of positive squares in 6 ways, for example, as 83667609 + 3498249316 = 9147^2 + 59146^2 .

It is not a de Polignac number, because 3581916925 - 2⁵ = 3581916893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3581916929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108915 + ... + 137935.

It is an arithmetic number, because the mean of its divisors is an integer number (370219143).

Almost surely, 2^3581916925 is an apocalyptic number.

It is an amenable number.

3581916925 is a deficient number, since it is larger than the sum of its proper divisors (860712791).

3581916925 is a wasteful number, since it uses less digits than its factorization.

3581916925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33968 (or 33963 counting only the distinct ones).

The product of its digits is 583200, while the sum is 49.

The square root of 3581916925 is about 59849.1179968427. The cubic root of 3581916925 is about 1530.0484022166.

The spelling of 3581916925 in words is "three billion, five hundred eighty-one million, nine hundred sixteen thousand, nine hundred twenty-five".