404856848418091 has 2 divisors, whose sum is σ = 404856848418092. Its totient is φ = 404856848418090.

The previous prime is 404856848418067. The next prime is 404856848418097. The reversal of 404856848418091 is 190814848658404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404856848418091 - 2²⁵ = 404856814863659 is a prime.

It is a super-2 number, since 2×404856848418091² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 404856848418091.

It is not a weakly prime, because it can be changed into another prime (404856848418097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202428424209045 + 202428424209046.

It is an arithmetic number, because the mean of its divisors is an integer number (202428424209046).

Almost surely, 2^{404856848418091} is an apocalyptic number.

404856848418091 is a deficient number, since it is larger than the sum of its proper divisors (1).

404856848418091 is an equidigital number, since it uses as much as digits as its factorization.

404856848418091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 283115520, while the sum is 70.

The spelling of 404856848418091 in words is "four hundred four trillion, eight hundred fifty-six billion, eight hundred forty-eight million, four hundred eighteen thousand, ninety-one".