3671687161 has 4 divisors (see below), whose sum is σ = 3671997300. Its totient is φ = 3671377024.

The previous prime is 3671687153. The next prime is 3671687177. The reversal of 3671687161 is 1617861763.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1717605136 + 1954082025 = 41444^2 + 44205^2 .

It is a cyclic number.

It is not a de Polignac number, because 3671687161 - 2³ = 3671687153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3671688161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136576 + ... + 161233.

It is an arithmetic number, because the mean of its divisors is an integer number (917999325).

Almost surely, 2^3671687161 is an apocalyptic number.

It is an amenable number.

3671687161 is a deficient number, since it is larger than the sum of its proper divisors (310139).

3671687161 is a wasteful number, since it uses less digits than its factorization.

3671687161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310138.

The product of its digits is 254016, while the sum is 46.

The square root of 3671687161 is about 60594.4482687977. The cubic root of 3671687161 is about 1542.7251406691.

The spelling of 3671687161 in words is "three billion, six hundred seventy-one million, six hundred eighty-seven thousand, one hundred sixty-one".