42444144077 has 2 divisors, whose sum is σ = 42444144078. Its totient is φ = 42444144076.

The previous prime is 42444144037. The next prime is 42444144121. The reversal of 42444144077 is 77044144424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28380793156 + 14063350921 = 168466^2 + 118589^2 .

It is a cyclic number.

It is not a de Polignac number, because 42444144077 - 2⁶ = 42444144013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42444144037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21222072038 + 21222072039.

It is an arithmetic number, because the mean of its divisors is an integer number (21222072039).

Almost surely, 2^42444144077 is an apocalyptic number.

It is an amenable number.

42444144077 is a deficient number, since it is larger than the sum of its proper divisors (1).

42444144077 is an equidigital number, since it uses as much as digits as its factorization.

42444144077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 401408, while the sum is 41.

The spelling of 42444144077 in words is "forty-two billion, four hundred forty-four million, one hundred forty-four thousand, seventy-seven".