3997412444161 has 2 divisors, whose sum is σ = 3997412444162. Its totient is φ = 3997412444160.

The previous prime is 3997412444147. The next prime is 3997412444189. The reversal of 3997412444161 is 1614442147993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3971375394561 + 26037049600 = 1992831^2 + 161360^2 .

It is a cyclic number.

It is not a de Polignac number, because 3997412444161 - 2¹³ = 3997412435969 is a prime.

It is not a weakly prime, because it can be changed into another prime (3997412444101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998706222080 + 1998706222081.

It is an arithmetic number, because the mean of its divisors is an integer number (1998706222081).

Almost surely, 2^{3997412444161} is an apocalyptic number.

It is an amenable number.

3997412444161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3997412444161 is an equidigital number, since it uses as much as digits as its factorization.

3997412444161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 55.

The spelling of 3997412444161 in words is "three trillion, nine hundred ninety-seven billion, four hundred twelve million, four hundred forty-four thousand, one hundred sixty-one".