3081243661 has 24 divisors (see below), whose sum is σ = 3309396480. Its totient is φ = 2868022944.

The previous prime is 3081243653. The next prime is 3081243689. The reversal of 3081243661 is 1663421803.

It is a happy number.

It is not a de Polignac number, because 3081243661 - 2³ = 3081243653 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 (3081243601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6432420 + ... + 6432898.

It is an arithmetic number, because the mean of its divisors is an integer number (137891520).

Almost surely, 2^3081243661 is an apocalyptic number.

It is an amenable number.

3081243661 is a deficient number, since it is larger than the sum of its proper divisors (228152819).

3081243661 is a wasteful number, since it uses less digits than its factorization.

3081243661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 3081243661 is about 55508.9511790666. The cubic root of 3081243661 is about 1455.1530738839.

The spelling of 3081243661 in words is "three billion, eighty-one million, two hundred forty-three thousand, six hundred sixty-one".