3946354000781 has 2 divisors, whose sum is σ = 3946354000782. Its totient is φ = 3946354000780.

The previous prime is 3946354000759. The next prime is 3946354000879. The reversal of 3946354000781 is 1870004536493.

3946354000781 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., 3776473189225 + 169880811556 = 1943315^2 + 412166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3946354000781 is a prime.

It is a super-2 number, since 2×3946354000781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3946354006781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973177000390 + 1973177000391.

It is an arithmetic number, because the mean of its divisors is an integer number (1973177000391).

Almost surely, 2^{3946354000781} is an apocalyptic number.

It is an amenable number.

3946354000781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3946354000781 is an equidigital number, since it uses as much as digits as its factorization.

3946354000781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 3946354000781 in words is "three trillion, nine hundred forty-six billion, three hundred fifty-four million, seven hundred eighty-one", and thus it is an aban number.