404386576520819 has 2 divisors, whose sum is σ = 404386576520820. Its totient is φ = 404386576520818.

The previous prime is 404386576520813. The next prime is 404386576520909. The reversal of 404386576520819 is 918025675683404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404386576520819 - 2⁴ = 404386576520803 is a prime.

It is a super-2 number, since 2×404386576520819² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (404386576520813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202193288260409 + 202193288260410.

It is an arithmetic number, because the mean of its divisors is an integer number (202193288260410).

It is a 1-persistent number, because it is pandigital, but 2⋅404386576520819 = 808773153041638 is not.

Almost surely, 2^{404386576520819} is an apocalyptic number.

404386576520819 is a deficient number, since it is larger than the sum of its proper divisors (1).

404386576520819 is an equidigital number, since it uses as much as digits as its factorization.

404386576520819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 348364800, while the sum is 68.

The spelling of 404386576520819 in words is "four hundred four trillion, three hundred eighty-six billion, five hundred seventy-six million, five hundred twenty thousand, eight hundred nineteen".