42888884581 has 2 divisors, whose sum is σ = 42888884582. Its totient is φ = 42888884580.

The previous prime is 42888884569. The next prime is 42888884611. The reversal of 42888884581 is 18548888824.

It is a happy number.

42888884581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26425428481 + 16463456100 = 162559^2 + 128310^2 .

It is a cyclic number.

It is not a de Polignac number, because 42888884581 - 2¹⁹ = 42888360293 is a prime.

It is a super-2 number, since 2×42888884581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42888884501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21444442290 + 21444442291.

It is an arithmetic number, because the mean of its divisors is an integer number (21444442291).

Almost surely, 2^42888884581 is an apocalyptic number.

It is an amenable number.

42888884581 is a deficient number, since it is larger than the sum of its proper divisors (1).

42888884581 is an equidigital number, since it uses as much as digits as its factorization.

42888884581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41943040, while the sum is 64.

The spelling of 42888884581 in words is "forty-two billion, eight hundred eighty-eight million, eight hundred eighty-four thousand, five hundred eighty-one".