404892556284421 has 2 divisors, whose sum is σ = 404892556284422. Its totient is φ = 404892556284420.

The previous prime is 404892556284409. The next prime is 404892556284457. The reversal of 404892556284421 is 124482655298404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402467232835396 + 2425323449025 = 20061586^2 + 1557345^2 .

It is a cyclic number.

It is not a de Polignac number, because 404892556284421 - 2⁵ = 404892556284389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404892556287421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202446278142210 + 202446278142211.

It is an arithmetic number, because the mean of its divisors is an integer number (202446278142211).

Almost surely, 2^{404892556284421} is an apocalyptic number.

It is an amenable number.

404892556284421 is a deficient number, since it is larger than the sum of its proper divisors (1).

404892556284421 is an equidigital number, since it uses as much as digits as its factorization.

404892556284421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176947200, while the sum is 64.

The spelling of 404892556284421 in words is "four hundred four trillion, eight hundred ninety-two billion, five hundred fifty-six million, two hundred eighty-four thousand, four hundred twenty-one".