42464543861 has 2 divisors, whose sum is σ = 42464543862. Its totient is φ = 42464543860.

The previous prime is 42464543827. The next prime is 42464543897. The reversal of 42464543861 is 16834546424.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38519950225 + 3944593636 = 196265^2 + 62806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42464543861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42464543461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21232271930 + 21232271931.

It is an arithmetic number, because the mean of its divisors is an integer number (21232271931).

Almost surely, 2^42464543861 is an apocalyptic number.

It is an amenable number.

42464543861 is a deficient number, since it is larger than the sum of its proper divisors (1).

42464543861 is an equidigital number, since it uses as much as digits as its factorization.

42464543861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 47.

The spelling of 42464543861 in words is "forty-two billion, four hundred sixty-four million, five hundred forty-three thousand, eight hundred sixty-one".