404556410261 has 2 divisors, whose sum is σ = 404556410262. Its totient is φ = 404556410260.

The previous prime is 404556410129. The next prime is 404556410329. The reversal of 404556410261 is 162014655404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262841807761 + 141714602500 = 512681^2 + 376450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404556410261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404550410261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202278205130 + 202278205131.

It is an arithmetic number, because the mean of its divisors is an integer number (202278205131).

Almost surely, 2^404556410261 is an apocalyptic number.

It is an amenable number.

404556410261 is a deficient number, since it is larger than the sum of its proper divisors (1).

404556410261 is an equidigital number, since it uses as much as digits as its factorization.

404556410261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 404556410261 in words is "four hundred four billion, five hundred fifty-six million, four hundred ten thousand, two hundred sixty-one".