42140365577 has 2 divisors, whose sum is σ = 42140365578. Its totient is φ = 42140365576.

The previous prime is 42140365511. The next prime is 42140365583. The reversal of 42140365577 is 77556304124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41183020096 + 957345481 = 202936^2 + 30941^2 .

It is a cyclic number.

It is not a de Polignac number, because 42140365577 - 2¹⁸ = 42140103433 is a prime.

It is not a weakly prime, because it can be changed into another prime (42140362577) 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, 21070182788 + 21070182789.

It is an arithmetic number, because the mean of its divisors is an integer number (21070182789).

Almost surely, 2^42140365577 is an apocalyptic number.

It is an amenable number.

42140365577 is a deficient number, since it is larger than the sum of its proper divisors (1).

42140365577 is an equidigital number, since it uses as much as digits as its factorization.

42140365577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 42140365577 in words is "forty-two billion, one hundred forty million, three hundred sixty-five thousand, five hundred seventy-seven".