3861957864917 has 2 divisors, whose sum is σ = 3861957864918. Its totient is φ = 3861957864916.

The previous prime is 3861957864913. The next prime is 3861957864967. The reversal of 3861957864917 is 7194687591683.

3861957864917 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., 3834335757316 + 27622107601 = 1958146^2 + 166199^2 .

It is a cyclic number.

It is not a de Polignac number, because 3861957864917 - 2² = 3861957864913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3861957864913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1930978932458 + 1930978932459.

It is an arithmetic number, because the mean of its divisors is an integer number (1930978932459).

Almost surely, 2^{3861957864917} is an apocalyptic number.

It is an amenable number.

3861957864917 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861957864917 is an equidigital number, since it uses as much as digits as its factorization.

3861957864917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 548674560, while the sum is 74.

The spelling of 3861957864917 in words is "three trillion, eight hundred sixty-one billion, nine hundred fifty-seven million, eight hundred sixty-four thousand, nine hundred seventeen".