4042395445909 has 2 divisors, whose sum is σ = 4042395445910. Its totient is φ = 4042395445908.

The previous prime is 4042395445901. The next prime is 4042395445961. The reversal of 4042395445909 is 9095445932404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4042323365809 + 72080100 = 2010553^2 + 8490^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042395445909 - 2³ = 4042395445901 is a prime.

It is a super-2 number, since 2×4042395445909² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4042395445901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021197722954 + 2021197722955.

It is an arithmetic number, because the mean of its divisors is an integer number (2021197722955).

Almost surely, 2^{4042395445909} is an apocalyptic number.

It is an amenable number.

4042395445909 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042395445909 is an equidigital number, since it uses as much as digits as its factorization.

4042395445909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27993600, while the sum is 58.

The spelling of 4042395445909 in words is "four trillion, forty-two billion, three hundred ninety-five million, four hundred forty-five thousand, nine hundred nine".