394564359853 has 2 divisors, whose sum is σ = 394564359854. Its totient is φ = 394564359852.

The previous prime is 394564359823. The next prime is 394564359877. The reversal of 394564359853 is 358953465493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375115826089 + 19448533764 = 612467^2 + 139458^2 .

It is a cyclic number.

It is not a de Polignac number, because 394564359853 - 2⁹ = 394564359341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394564359803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197282179926 + 197282179927.

It is an arithmetic number, because the mean of its divisors is an integer number (197282179927).

Almost surely, 2^394564359853 is an apocalyptic number.

It is an amenable number.

394564359853 is a deficient number, since it is larger than the sum of its proper divisors (1).

394564359853 is an equidigital number, since it uses as much as digits as its factorization.

394564359853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952000, while the sum is 64.

The spelling of 394564359853 in words is "three hundred ninety-four billion, five hundred sixty-four million, three hundred fifty-nine thousand, eight hundred fifty-three".