3671856961 has 4 divisors (see below), whose sum is σ = 3687093124. Its totient is φ = 3656620800.

The previous prime is 3671856931. The next prime is 3671856971. The reversal of 3671856961 is 1696581763.

It is a happy number.

3671856961 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 3347316736 + 324540225 = 57856^2 + 18015^2 .

It is a cyclic number.

It is not a de Polignac number, because 3671856961 - 2⁹ = 3671856449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3671856899 and 3671856908.

It is not an unprimeable number, because it can be changed into a prime (3671856931) 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, 7617720 + ... + 7618201.

It is an arithmetic number, because the mean of its divisors is an integer number (921773281).

Almost surely, 2^3671856961 is an apocalyptic number.

It is an amenable number.

3671856961 is a deficient number, since it is larger than the sum of its proper divisors (15236163).

3671856961 is a wasteful number, since it uses less digits than its factorization.

3671856961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15236162.

The product of its digits is 1632960, while the sum is 52.

The square root of 3671856961 is about 60595.8493710584. The cubic root of 3671856961 is about 1542.7489218065.

The spelling of 3671856961 in words is "three billion, six hundred seventy-one million, eight hundred fifty-six thousand, nine hundred sixty-one".