3161115661 has 4 divisors (see below), whose sum is σ = 3448489824. Its totient is φ = 2873741500.

The previous prime is 3161115611. The next prime is 3161115667. The reversal of 3161115661 is 1665111613.

3161115661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3161115661 - 2⁷ = 3161115533 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 (3161115667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143687065 + ... + 143687086.

It is an arithmetic number, because the mean of its divisors is an integer number (862122456).

Almost surely, 2^3161115661 is an apocalyptic number.

It is an amenable number.

3161115661 is a deficient number, since it is larger than the sum of its proper divisors (287374163).

3161115661 is a wasteful number, since it uses less digits than its factorization.

3161115661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287374162.

The product of its digits is 3240, while the sum is 31.

The square root of 3161115661 is about 56223.7997737613. The cubic root of 3161115661 is about 1467.6194615178.

The spelling of 3161115661 in words is "three billion, one hundred sixty-one million, one hundred fifteen thousand, six hundred sixty-one".