408783854861 has 2 divisors, whose sum is σ = 408783854862. Its totient is φ = 408783854860.

The previous prime is 408783854803. The next prime is 408783854879. The reversal of 408783854861 is 168458387804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218159055625 + 190624799236 = 467075^2 + 436606^2 .

It is a cyclic number.

It is not a de Polignac number, because 408783854861 - 2¹⁰ = 408783853837 is a prime.

It is a super-2 number, since 2×408783854861² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 408783854794 and 408783854803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408783854261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204391927430 + 204391927431.

It is an arithmetic number, because the mean of its divisors is an integer number (204391927431).

Almost surely, 2^408783854861 is an apocalyptic number.

It is an amenable number.

408783854861 is a deficient number, since it is larger than the sum of its proper divisors (1).

408783854861 is an equidigital number, since it uses as much as digits as its factorization.

408783854861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41287680, while the sum is 62.

The spelling of 408783854861 in words is "four hundred eight billion, seven hundred eighty-three million, eight hundred fifty-four thousand, eight hundred sixty-one".