42795405581 has 2 divisors, whose sum is σ = 42795405582. Its totient is φ = 42795405580.

The previous prime is 42795405547. The next prime is 42795405721. The reversal of 42795405581 is 18550459724.

42795405581 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., 29220825481 + 13574580100 = 170941^2 + 116510^2 .

It is a cyclic number.

It is not a de Polignac number, because 42795405581 - 2¹⁰ = 42795404557 is a prime.

It is a super-2 number, since 2×42795405581² (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 (42795405181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21397702790 + 21397702791.

It is an arithmetic number, because the mean of its divisors is an integer number (21397702791).

Almost surely, 2^42795405581 is an apocalyptic number.

It is an amenable number.

42795405581 is a deficient number, since it is larger than the sum of its proper divisors (1).

42795405581 is an equidigital number, since it uses as much as digits as its factorization.

42795405581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016000, while the sum is 50.

The spelling of 42795405581 in words is "forty-two billion, seven hundred ninety-five million, four hundred five thousand, five hundred eighty-one".