416055781 has 2 divisors, whose sum is σ = 416055782. Its totient is φ = 416055780.

The previous prime is 416055769. The next prime is 416055839. The reversal of 416055781 is 187550614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340956225 + 75099556 = 18465^2 + 8666^2 .

It is a cyclic number.

It is not a de Polignac number, because 416055781 - 2²⁵ = 382501349 is a prime.

It is a super-2 number, since 2×416055781² = 346204825807039922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 416055781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (416055701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208027890 + 208027891.

It is an arithmetic number, because the mean of its divisors is an integer number (208027891).

Almost surely, 2^416055781 is an apocalyptic number.

It is an amenable number.

416055781 is a deficient number, since it is larger than the sum of its proper divisors (1).

416055781 is an equidigital number, since it uses as much as digits as its factorization.

416055781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 416055781 is about 20397.4454528012. The cubic root of 416055781 is about 746.5355957704.

The spelling of 416055781 in words is "four hundred sixteen million, fifty-five thousand, seven hundred eighty-one".