42490815841 has 6 divisors (see below), whose sum is σ = 42746803490. Its totient is φ = 42236352096.

The previous prime is 42490815839. The next prime is 42490815877. The reversal of 42490815841 is 14851809424.

It can be written as a sum of positive squares in only one way, i.e., 39360972816 + 3129843025 = 198396^2 + 55945^2 .

It is not a de Polignac number, because 42490815841 - 2¹ = 42490815839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42490815791 and 42490815800.

It is not an unprimeable number, because it can be changed into a prime (42490815881) 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 in 5 ways as a sum of consecutive naturals, for example, 733896 + ... + 789673.

Almost surely, 2^42490815841 is an apocalyptic number.

It is an amenable number.

42490815841 is a deficient number, since it is larger than the sum of its proper divisors (255987649).

42490815841 is an equidigital number, since it uses as much as digits as its factorization.

42490815841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523903 (or 1523736 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 42490815841 in words is "forty-two billion, four hundred ninety million, eight hundred fifteen thousand, eight hundred forty-one".