406778548441 has 2 divisors, whose sum is σ = 406778548442. Its totient is φ = 406778548440.

The previous prime is 406778548331. The next prime is 406778548469. The reversal of 406778548441 is 144845877604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262378548441 + 144400000000 = 512229^2 + 380000^2 .

It is a cyclic number.

It is not a de Polignac number, because 406778548441 - 2¹³ = 406778540249 is a prime.

It is not a weakly prime, because it can be changed into another prime (406778348441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203389274220 + 203389274221.

It is an arithmetic number, because the mean of its divisors is an integer number (203389274221).

Almost surely, 2^406778548441 is an apocalyptic number.

It is an amenable number.

406778548441 is a deficient number, since it is larger than the sum of its proper divisors (1).

406778548441 is an equidigital number, since it uses as much as digits as its factorization.

406778548441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24084480, while the sum is 58.

The spelling of 406778548441 in words is "four hundred six billion, seven hundred seventy-eight million, five hundred forty-eight thousand, four hundred forty-one".