42143564497 has 4 divisors (see below), whose sum is σ = 43171456356. Its totient is φ = 41115672640.

The previous prime is 42143564471. The next prime is 42143564521. The reversal of 42143564497 is 79446534124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4862133441 + 37281431056 = 69729^2 + 193084^2 .

It is a cyclic number.

It is not a de Polignac number, because 42143564497 - 2⁷ = 42143564369 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42143564497.

It is not an unprimeable number, because it can be changed into a prime (42143564467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513945868 + ... + 513945949.

It is an arithmetic number, because the mean of its divisors is an integer number (10792864089).

Almost surely, 2^42143564497 is an apocalyptic number.

It is an amenable number.

42143564497 is a deficient number, since it is larger than the sum of its proper divisors (1027891859).

42143564497 is a wasteful number, since it uses less digits than its factorization.

42143564497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027891858.

The product of its digits is 2903040, while the sum is 49.

The spelling of 42143564497 in words is "forty-two billion, one hundred forty-three million, five hundred sixty-four thousand, four hundred ninety-seven".