394896145536019 has 2 divisors, whose sum is σ = 394896145536020. Its totient is φ = 394896145536018.

The previous prime is 394896145536017. The next prime is 394896145536089. The reversal of 394896145536019 is 910635541698493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394896145536019 - 2¹ = 394896145536017 is a prime.

It is a super-2 number, since 2×394896145536019² (a number of 30 digits) contains 22 as substring.

Together with 394896145536017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (394896145536017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197448072768009 + 197448072768010.

It is an arithmetic number, because the mean of its divisors is an integer number (197448072768010).

Almost surely, 2^{394896145536019} is an apocalyptic number.

394896145536019 is a deficient number, since it is larger than the sum of its proper divisors (1).

394896145536019 is an equidigital number, since it uses as much as digits as its factorization.

394896145536019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 755827200, while the sum is 73.

The spelling of 394896145536019 in words is "three hundred ninety-four trillion, eight hundred ninety-six billion, one hundred forty-five million, five hundred thirty-six thousand, nineteen".