42369800581 has 2 divisors, whose sum is σ = 42369800582. Its totient is φ = 42369800580.

The previous prime is 42369800563. The next prime is 42369800597. The reversal of 42369800581 is 18500896324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36255968100 + 6113832481 = 190410^2 + 78191^2 .

It is a cyclic number.

It is not a de Polignac number, because 42369800581 - 2²¹ = 42367703429 is a prime.

It is a super-2 number, since 2×42369800581² (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 (42369860581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21184900290 + 21184900291.

It is an arithmetic number, because the mean of its divisors is an integer number (21184900291).

Almost surely, 2^42369800581 is an apocalyptic number.

It is an amenable number.

42369800581 is a deficient number, since it is larger than the sum of its proper divisors (1).

42369800581 is an equidigital number, since it uses as much as digits as its factorization.

42369800581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 42369800581 in words is "forty-two billion, three hundred sixty-nine million, eight hundred thousand, five hundred eighty-one".