399686400000071 has 2 divisors, whose sum is σ = 399686400000072. Its totient is φ = 399686400000070.

The previous prime is 399686399999993. The next prime is 399686400000077. The reversal of 399686400000071 is 170000004686993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399686400000071 - 2¹⁸ = 399686399737927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399686399999959 and 399686400000022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399686400000077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199843200000035 + 199843200000036.

It is an arithmetic number, because the mean of its divisors is an integer number (199843200000036).

Almost surely, 2^{399686400000071} is an apocalyptic number.

399686400000071 is a deficient number, since it is larger than the sum of its proper divisors (1).

399686400000071 is an equidigital number, since it uses as much as digits as its factorization.

399686400000071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 399686400000071 in words is "three hundred ninety-nine trillion, six hundred eighty-six billion, four hundred million, seventy-one", and thus it is an aban number.