442778794433 has 2 divisors, whose sum is σ = 442778794434. Its totient is φ = 442778794432.

The previous prime is 442778794399. The next prime is 442778794457. The reversal of 442778794433 is 334497877244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308816938369 + 133961856064 = 555713^2 + 366008^2 .

It is a cyclic number.

It is not a de Polignac number, because 442778794433 - 2²⁸ = 442510358977 is a prime.

It is not a weakly prime, because it can be changed into another prime (442778194433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221389397216 + 221389397217.

It is an arithmetic number, because the mean of its divisors is an integer number (221389397217).

Almost surely, 2^442778794433 is an apocalyptic number.

It is an amenable number.

442778794433 is a deficient number, since it is larger than the sum of its proper divisors (1).

442778794433 is an equidigital number, since it uses as much as digits as its factorization.

442778794433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113799168, while the sum is 62.

The spelling of 442778794433 in words is "four hundred forty-two billion, seven hundred seventy-eight million, seven hundred ninety-four thousand, four hundred thirty-three".