42546115609 has 2 divisors, whose sum is σ = 42546115610. Its totient is φ = 42546115608.

The previous prime is 42546115603. The next prime is 42546115621. The reversal of 42546115609 is 90651164524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40206265225 + 2339850384 = 200515^2 + 48372^2 .

It is a cyclic number.

It is not a de Polignac number, because 42546115609 - 2¹⁹ = 42545591321 is a prime.

It is not a weakly prime, because it can be changed into another prime (42546115603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21273057804 + 21273057805.

It is an arithmetic number, because the mean of its divisors is an integer number (21273057805).

Almost surely, 2^42546115609 is an apocalyptic number.

It is an amenable number.

42546115609 is a deficient number, since it is larger than the sum of its proper divisors (1).

42546115609 is an equidigital number, since it uses as much as digits as its factorization.

42546115609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 42546115609 in words is "forty-two billion, five hundred forty-six million, one hundred fifteen thousand, six hundred nine".