40242104009 has 2 divisors, whose sum is σ = 40242104010. Its totient is φ = 40242104008.

The previous prime is 40242103991. The next prime is 40242104033. The reversal of 40242104009 is 90040124204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30049182409 + 10192921600 = 173347^2 + 100960^2 .

It is a cyclic number.

It is not a de Polignac number, because 40242104009 - 2¹² = 40242099913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40242104209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121052004 + 20121052005.

It is an arithmetic number, because the mean of its divisors is an integer number (20121052005).

Almost surely, 2^40242104009 is an apocalyptic number.

It is an amenable number.

40242104009 is a deficient number, since it is larger than the sum of its proper divisors (1).

40242104009 is an equidigital number, since it uses as much as digits as its factorization.

40242104009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The spelling of 40242104009 in words is "forty billion, two hundred forty-two million, one hundred four thousand, nine".