3815817932161 has 2 divisors, whose sum is σ = 3815817932162. Its totient is φ = 3815817932160.

The previous prime is 3815817932159. The next prime is 3815817932177. The reversal of 3815817932161 is 1612397185183.

3815817932161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3408339976561 + 407477955600 = 1846169^2 + 638340^2 .

It is a cyclic number.

It is not a de Polignac number, because 3815817932161 - 2¹ = 3815817932159 is a prime.

Together with 3815817932159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3815817932111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1907908966080 + 1907908966081.

It is an arithmetic number, because the mean of its divisors is an integer number (1907908966081).

Almost surely, 2^{3815817932161} is an apocalyptic number.

It is an amenable number.

3815817932161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3815817932161 is an equidigital number, since it uses as much as digits as its factorization.

3815817932161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 55.

The spelling of 3815817932161 in words is "three trillion, eight hundred fifteen billion, eight hundred seventeen million, nine hundred thirty-two thousand, one hundred sixty-one".