394361163481 has 2 divisors, whose sum is σ = 394361163482. Its totient is φ = 394361163480.

The previous prime is 394361163479. The next prime is 394361163529. The reversal of 394361163481 is 184361163493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379104961225 + 15256202256 = 615715^2 + 123516^2 .

It is a cyclic number.

It is not a de Polignac number, because 394361163481 - 2¹ = 394361163479 is a prime.

It is a super-2 number, since 2×394361163481² (a number of 24 digits) contains 22 as substring.

Together with 394361163479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (394361163431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197180581740 + 197180581741.

It is an arithmetic number, because the mean of its divisors is an integer number (197180581741).

Almost surely, 2^394361163481 is an apocalyptic number.

It is an amenable number.

394361163481 is a deficient number, since it is larger than the sum of its proper divisors (1).

394361163481 is an equidigital number, since it uses as much as digits as its factorization.

394361163481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 49.

The spelling of 394361163481 in words is "three hundred ninety-four billion, three hundred sixty-one million, one hundred sixty-three thousand, four hundred eighty-one".