416254959821 has 2 divisors, whose sum is σ = 416254959822. Its totient is φ = 416254959820.

The previous prime is 416254959817. The next prime is 416254959847. The reversal of 416254959821 is 128959452614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 347880554596 + 68374405225 = 589814^2 + 261485^2 .

It is a cyclic number.

It is not a de Polignac number, because 416254959821 - 2² = 416254959817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (416254959811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208127479910 + 208127479911.

It is an arithmetic number, because the mean of its divisors is an integer number (208127479911).

Almost surely, 2^416254959821 is an apocalyptic number.

It is an amenable number.

416254959821 is a deficient number, since it is larger than the sum of its proper divisors (1).

416254959821 is an equidigital number, since it uses as much as digits as its factorization.

416254959821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6220800, while the sum is 56.

The spelling of 416254959821 in words is "four hundred sixteen billion, two hundred fifty-four million, nine hundred fifty-nine thousand, eight hundred twenty-one".